diff --git a/src/admin/components/advanced-search/advanced-search.vue b/src/admin/components/advanced-search/advanced-search.vue
index 5d1db79a0..ae3239fc2 100644
--- a/src/admin/components/advanced-search/advanced-search.vue
+++ b/src/admin/components/advanced-search/advanced-search.vue
@@ -15,7 +15,9 @@
                         grouped>
 
                     <!-- Metadata (Search criteria) -->
-                    <b-field class="column">
+                    <b-field
+                            :class="{'is-3': isHeader}"
+                            class="column">
                         <b-select
                                 :placeholder="$i18n.get('instruction_select_a_metadatum')"
                                 :disabled="advancedSearchQuery.taxquery[searchCriterion] ||
@@ -33,8 +35,9 @@
                     </b-field>
 
                     <!-- Inputs -->
-                    <b-field 
-                            class="column is-two-thirds">
+                    <b-field
+                            :class="{'is-two-thirds': !isHeader}"
+                            class="column">
                         <b-input
                                 v-if="advancedSearchQuery.metaquery[searchCriterion] &&
                                  advancedSearchQuery.metaquery[searchCriterion].ptype != 'date'"
@@ -70,7 +73,8 @@
                     </b-field>
 
                     <!-- Comparators -->
-                    <b-field 
+                    <b-field
+                            :class="{'is-3': isHeader}"
                             class="column">
                         <b-select
                                 v-if="advancedSearchQuery.taxquery[searchCriterion] ||
@@ -104,15 +108,13 @@
             <!-- Add button -->
             <div
                     v-show="!advancedSearchResults"
-                    :style="{
-                        'margin-top': '-15px !important',
-                        'padding-left': '25px !important'
-                    }"
+                    :class="{'add-link-advanced-search-header': isHeader, 'add-link-advanced-search': !isHeader }"
                     class="field column is-12">
                 <a
                     @click="addSearchCriteria"
-                    class="is-secondary is-small add-link">
+                    class="is-secondary add-link">
                     <b-icon
+                            class="add-i"
                             icon="plus-circle"
                             size="is-small"
                             type="is-secondary"/>
@@ -188,6 +190,7 @@
         props: {
             metadata: Array,
             isRepositoryLevel: false,
+            isHeader: false,
             advancedSearchResults: false,
             openFormAdvancedSearch: false,
             isDoSearch: false,
@@ -406,7 +409,20 @@
             addValueToAdvancedSearchQuery: _.debounce(function(value, type, searchCriterion) {
                 this.addToAdvancedSearchQuery(value, type, searchCriterion);
             }, 900),
-            searchAdvanced(){                
+            searchAdvanced(){
+
+                if(this.isHeader){
+                    if(this.$route.path == '/items') {
+                        this.$root.$emit('openAdvancedSearch', true);
+                    }
+
+                    if(this.$route.path != '/items') {
+                        this.$router.push({
+                            path: '/items',
+                        });
+                    }
+                }
+
                 if(Object.keys(this.advancedSearchQuery.taxquery).length > 0 &&
                  Object.keys(this.advancedSearchQuery.metaquery).length > 0){
                     this.advancedSearchQuery.relation = 'AND';
@@ -551,6 +567,15 @@
                 }
             }
         }
+
+        .add-link-advanced-search {
+            margin-top: -15px !important;
+            padding-left: 25px !important;
+        }
+
+        .add-link-advanced-search-header {
+            margin-top: -20px !important;
+        }
     }
 
 </style>
\ No newline at end of file
diff --git a/src/admin/components/navigation/tainacan-header.vue b/src/admin/components/navigation/tainacan-header.vue
index 1119f35a3..9d7524922 100644
--- a/src/admin/components/navigation/tainacan-header.vue
+++ b/src/admin/components/navigation/tainacan-header.vue
@@ -21,38 +21,41 @@
                     <input
                             autocomplete="on"
                             :placeholder="$i18n.get('instruction_search_in_repository')"
-                            class="input is-small"
+                            class="input is-small search-header"
                             type="search"
                             :value="searchQuery"
                             @input="futureSearchQuery = $event.target.value"
                             @keyup.enter="updateSearch()">
-                    <span class="icon is-right">
-                        <i
-                                @click="updateSearch()"
-                                class="mdi mdi-magnify"/>
-                    </span>
-                    <!--<b-dropdown-->
-                            <!--position="is-bottom-left">-->
-                        <!--<b-icon-->
-                                <!--class="is-right"-->
-                                <!--slot="trigger"-->
-                                <!--size="is-small"-->
-                                <!--icon="menu-down"/>-->
-                        <!--<b-dropdown-item>-->
-                            <!--<p class="is-left">{{ $i18n.get('advanced_search') }}</p>-->
-                            <!--<b-icon-->
-                                    <!--icon="menu-up"-->
-                                    <!--class="is-right" />-->
-                        <!--</b-dropdown-item>-->
-                        <!--<b-dropdown-item-->
-                                <!--:custom="true">-->
-                            <!--<advanced-search />-->
-                        <!--</b-dropdown-item>-->
-                    <!--</b-dropdown>-->
+                    <!--<span class="icon is-right">-->
+                        <!--<i-->
+                                <!--@click="updateSearch()"-->
+                                <!--class="mdi mdi-magnify"/>-->
+                    <!--</span>-->
+                    <b-dropdown
+                            class="advanced-search-header-dropdown"
+                            position="is-bottom-left">
+                        <b-icon
+                                class="is-right"
+                                slot="trigger"
+                                size="is-small"
+                                icon="menu-down"/>
+                        <b-dropdown-item>
+                            <p class="is-left">{{ $i18n.get('advanced_search') }}</p>
+                            <b-icon
+                                    icon="menu-up"
+                                    class="is-right" />
+                        </b-dropdown-item>
+                        <b-dropdown-item
+                                :custom="true">
+                            <advanced-search
+                                    :metadata="metadata"
+                                    :is-header="true"/>
+                        </b-dropdown-item>
+                    </b-dropdown>
                 </div>
-                <a
-                        :style="{color: 'white'}"
-                        @click="toItemsPage">{{ $i18n.get('advanced_search') }}</a>
+                <!--<a-->
+                        <!--:style="{color: 'white'}"-->
+                        <!--@click="toItemsPage">{{ $i18n.get('advanced_search') }}</a>-->
             </div>
             <a
                     :style="{color: 'white'}"
@@ -67,6 +70,7 @@
 <script>
 
     import AdvancedSearch from '../advanced-search/advanced-search.vue';
+    import { mapActions } from 'vuex';
 
     export default {
         name: 'TainacanHeader',
@@ -76,26 +80,30 @@
                 wordpressAdmin: window.location.origin + window.location.pathname.replace('admin.php', ''),
                 searchQuery: '',
                 futureSearchQuery: '',
+                metadata: Array,
             }
         },
         components: {
             AdvancedSearch,
         },
         methods: {
-            toItemsPage() {
-                if(this.$route.path == '/items') {
-                    this.$root.$emit('openAdvancedSearch', true);
-                }
-
-                if(this.$route.path != '/items') {
-                    this.$router.push({
-                        path: '/items',
-                        query: {
-                            advancedSearch: true
-                        }
-                    });
-                }
-            },
+            ...mapActions('metadata', [
+                'fetchMetadata'
+            ]),
+            // toItemsPage() {
+            //     if(this.$route.path == '/items') {
+            //         this.$root.$emit('openAdvancedSearch', true);
+            //     }
+            //
+            //     if(this.$route.path != '/items') {
+            //         this.$router.push({
+            //             path: '/items',
+            //             query: {
+            //                 advancedSearch: true
+            //             }
+            //         });
+            //     }
+            // },
             updateSearch() {
                 if (this.$route.path != '/items') {
                     this.$router.push({
@@ -108,7 +116,18 @@
         },
         props: {
             isMenuCompressed: false
-        }
+        },
+        created(){
+          this.fetchMetadata({
+              collectionId: false,
+              isRepositoryLevel: true,
+              isContextEdit: false,
+              includeDisabled: false,
+          })
+              .then((metadata) => {
+                  this.metadata = metadata;
+              });
+        },
     }
 </script>
 
@@ -146,7 +165,7 @@
                 }
                 .tainacan-logo {
                     max-height: 22px;
-                    padding: 0px 24px;
+                    padding: 0 24px;
                     transition: padding 0.15s;
                     -webkit-transition: padding linear 0.15s;
                 }
@@ -159,8 +178,8 @@
                 align-items: center;
                 margin-right: 36px;
 
-                .control:not(.tnc-advanced-search-container) {
-                    input {
+                .control {
+                    .search-header {
                         border-width: 0 !important;
                         height: 27px;
                         font-size: 11px;
@@ -169,10 +188,10 @@
                         -webkit-transition: width linear 0.15s;
                         width: 160px;
                     }
-                    input:focus, input:active {
+                    .search-header:focus, .search-header:active {
                         width: 220px !important;
                     }
-                    .icon {
+                    .icon:not(.add-i) {
                         pointer-events: all;
                         color: $tertiary;
                         cursor: pointer;
@@ -182,18 +201,24 @@
                     }
                 }
 
-                /*.dropdown-content {*/
-                    /*width: 800px !important;*/
-                /*}*/
-
-                /*.dropdown-item:hover {*/
-                    /*background-color: white;*/
-                /*}*/
-
-                a {
-                    margin: 0px 12px;
-                    font-size: 12px;
+                .dropdown-content {
+                    width: 800px !important;
                 }
+
+                .dropdown-item:hover {
+                    background-color: white;
+                }
+
+                .dropdown-item {
+                    span.icon:not(.is-right) {
+                        position: relative !important;
+                    }
+                }
+
+                /*a {*/
+                    /*margin: 0px 12px;*/
+                    /*font-size: 12px;*/
+                /*}*/
             }
         }
         &.menu-compressed {
@@ -201,20 +226,20 @@
                 width: 220px;
                 background-color: $secondary;
                 .tainacan-logo {
-                    padding: 0px 42px;
+                    padding: 0 42px;
                 }
             }
 
         }
 
         @media screen and (max-width: 769px) {
-            padding: 0px;
+            padding: 0;
             display: flex;
             .level-left {
                 display: inline-block;
-                margin-left: 0px !important;
+                margin-left: 0 !important;
                 .level-item {
-                    margin-left: 0px;
+                    margin-left: 0;
                 }
             }
             .level-right {
@@ -222,8 +247,8 @@
                 display: inline-block;
             }
 
-            top: 0px;
-            margin-bottom: 0px !important;
+            top: 0;
+            margin-bottom: 0 !important;
         }
 
     }
diff --git a/src/admin/scss/tainacan-admin.scss b/src/admin/scss/tainacan-admin.scss
index 20b9ddb8c..650f50c53 100644
--- a/src/admin/scss/tainacan-admin.scss
+++ b/src/admin/scss/tainacan-admin.scss
@@ -56,7 +56,7 @@ a:hover {
     &.disabled {
         pointer-events: none;
         cursor: default;
-        color: $tainacan-input-background;
+        color: $tainacan-input-background !important;
 
         .icon {
             color: $tainacan-input-background !important;
diff --git a/src/classes/repositories/class-tainacan-collections.php b/src/classes/repositories/class-tainacan-collections.php
index 6f5cc2fc2..e958d9593 100644
--- a/src/classes/repositories/class-tainacan-collections.php
+++ b/src/classes/repositories/class-tainacan-collections.php
@@ -265,7 +265,7 @@ class Collections extends Repository {
 		$this->pre_update_moderators( $collection );
 		$new_collection = parent::insert( $collection );
 
-		$Tainacan_Metadata->register_core_metadata( $new_collection );
+		//$Tainacan_Metadata->register_core_metadata( $new_collection );
 		$collection->register_collection_item_post_type();
 		flush_rewrite_rules(false); // needed to activate items post type archive url
 		$this->update_moderators( $new_collection );
diff --git a/src/classes/repositories/class-tainacan-item-metadata.php b/src/classes/repositories/class-tainacan-item-metadata.php
index b6630e924..b728f5684 100644
--- a/src/classes/repositories/class-tainacan-item-metadata.php
+++ b/src/classes/repositories/class-tainacan-item-metadata.php
@@ -52,8 +52,8 @@ class Item_Metadata extends Repository {
 		if ($metadata_type->get_core()) {
 			$this->save_core_metadatum_value($item_metadata);
 			// Core metadata are also stored as regular metadata (in the code following below)
-			// This is usefull to create queries via filters, advanced search or apis
-			// si you can search for title and content with meta_query as if they were regular metadata
+			// This is useful to create queries via filters, advanced search or APIs
+			// if you can search for title and content with meta_query as if they were regular metadata
 		} 
 		
 		if ($metadata_type->get_primitive_type() == 'term') {
@@ -122,11 +122,14 @@ class Item_Metadata extends Repository {
 
     public function save_core_metadatum_value(\Tainacan\Entities\Item_Metadata_Entity $item_metadata) {
         $metadata_type = $item_metadata->get_metadatum()->get_metadata_type_object();
+
         if ($metadata_type->get_core()) {
             $item = $item_metadata->get_item();
             $set_method = 'set_' . $metadata_type->get_related_mapped_prop();
+
             $value = $item_metadata->get_value();
             $item->$set_method( is_array( $value ) ? $value[0] : $value );
+
             if ($item->validate_core_metadata()) {
                 $Tainacan_Items = \Tainacan\Repositories\Items::get_instance();
                 $Tainacan_Items->insert($item);
diff --git a/src/classes/repositories/class-tainacan-metadata.php b/src/classes/repositories/class-tainacan-metadata.php
index b65ce9ecf..cead23047 100644
--- a/src/classes/repositories/class-tainacan-metadata.php
+++ b/src/classes/repositories/class-tainacan-metadata.php
@@ -37,6 +37,8 @@ class Metadata extends Repository {
         parent::__construct();
         add_filter('pre_trash_post', array( &$this, 'disable_delete_core_metadata' ), 10, 2 );
         add_filter('pre_delete_post', array( &$this, 'force_delete_core_metadata' ), 10, 3 );
+
+        add_action('tainacan-collection-parent-updated', array(&$this, 'update_core_metadata_meta_keys'), 10, 2);
     }
 	
     public function get_map() {
@@ -496,6 +498,154 @@ class Metadata extends Repository {
         return $this->metadata_types;
     }
 
+
+	/**
+	 * That function update the core metadatum meta key, in case of changing the collection parent
+	 *
+	 * @param Entities\Collection $collection
+	 * @param $parent_collection_id
+	 *
+	 * @return void
+	 * @throws \Exception
+	 */
+	public function update_core_metadata_meta_keys($collection_old, Entities\Collection $collection_new){
+
+		global $wpdb;
+
+		$wpdb->flush();
+
+		$item_post_type = "%%{$collection_new->get_id()}_item";
+		$parent_collection_id = $collection_new->get_parent();
+
+		if($parent_collection_id != 0){
+
+			$metadata = $this->get_core_metadata( $collection_new );
+
+			$data_core_metadata = $this->get_data_core_metadata($collection_new);
+
+			$parent_collection = new Entities\Collection($parent_collection_id);
+
+			$parent_cores = $this->get_core_metadata($parent_collection);
+
+			if(!empty($metadata)){
+
+				foreach ( $data_core_metadata as $index => $data_core_metadatum ) {
+					foreach ( $metadata as $metadatum ){
+						if ( $metadatum->get_metadata_type() === $data_core_metadatum['metadata_type'] ) {
+							foreach ($parent_cores as $parent_core){
+								if($metadatum->get_metadata_type() === $parent_core->get_metadata_type()){
+
+									$old_metadatum_id = $metadatum->get_id();
+									$new_metadatum_id = $parent_core->get_id();
+
+									$sql_statement = $wpdb->prepare(
+										"UPDATE $wpdb->postmeta
+											SET meta_key = %s
+										 WHERE meta_key = %s AND post_id IN (
+										 	SELECT ID 
+										 	FROM $wpdb->posts 
+										 	WHERE post_type LIKE %s
+										)", $new_metadatum_id, $old_metadatum_id, $item_post_type
+									);
+
+									$res = $wpdb->query($sql_statement);
+
+									wp_cache_flush();
+
+									if($res !== false) {
+										update_post_meta( $metadatum->get_id(), 'metadata_type', 'to_delete', $data_core_metadatum['metadata_type'] );
+										wp_delete_post( $metadatum->get_id(), true);
+									}
+								}
+							}
+						}
+					}
+				}
+			}
+		} else {
+
+			$old_parent = 0;
+
+			if (!$collection_old) {
+				$this->register_core_metadata($collection_new);
+			} else {
+				$old_parent = $collection_old->get_parent();
+
+				$this->register_core_metadata($collection_new);
+			}
+
+			if($old_parent != 0) {
+				$metadata = $this->get_core_metadata( $collection_new );
+
+				$data_core_metadata = $this->get_data_core_metadata( $collection_new );
+
+				$parent_collection = new Entities\Collection( $old_parent );
+
+				$parent_cores = $this->get_core_metadata( $parent_collection );
+
+				foreach ( $data_core_metadata as $index => $data_core_metadatum ) {
+					foreach ( $metadata as $metadatum ) {
+						if ( $metadatum->get_metadata_type() === $data_core_metadatum['metadata_type'] ) {
+							foreach ( $parent_cores as $parent_core ) {
+								if ( $metadatum->get_metadata_type() === $parent_core->get_metadata_type() ) {
+
+									$old_metadatum_id = $parent_core->get_id();
+									$new_metadatum_id = $metadatum->get_id();
+
+									$sql_statement = $wpdb->prepare(
+										"UPDATE $wpdb->postmeta
+											SET meta_key = %s
+										 WHERE meta_key = %s AND post_id IN (
+										 	SELECT ID 
+										 	FROM $wpdb->posts 
+										 	WHERE post_type LIKE %s
+										)", $new_metadatum_id, $old_metadatum_id, $item_post_type
+									);
+
+									$res = $wpdb->query($sql_statement);
+
+									wp_cache_flush();
+								}
+							}
+						}
+					}
+				}
+			}
+		}
+    }
+
+	/**
+	 * @param Entities\Collection $collection
+	 *
+	 * @return array
+	 */
+	private function get_data_core_metadata(Entities\Collection $collection){
+
+		return $data_core_metadata = [
+			'core_description' => [
+				'name'          => 'Description',
+				'description'   => 'description',
+				'collection_id' => $collection->get_id(),
+				'metadata_type'    => 'Tainacan\Metadata_Types\Core_Description',
+				'status'        => 'publish',
+				'exposer_mapping'	=> [
+					'dublin-core' => 'description'
+				]
+			],
+			'core_title'       => [
+				'name'          => 'Title',
+				'description'   => 'title',
+				'collection_id' => $collection->get_id(),
+				'metadata_type'    => 'Tainacan\Metadata_Types\Core_Title',
+				'status'        => 'publish',
+				'exposer_mapping'	=> [
+					'dublin-core' => 'title'
+				]
+			]
+		];
+
+    }
+
 	/**
 	 * @param Entities\Collection $collection
 	 *
@@ -507,45 +657,7 @@ class Metadata extends Repository {
 
         $metadata = $this->get_core_metadata( $collection );
 
-        // TODO: create a better way to retrieve this data
-        $data_core_metadata = [
-            'core_description' => [
-                'name'          => 'Description',
-                'description'   => 'description',
-                'collection_id' => $collection->get_id(),
-                'metadata_type'    => 'Tainacan\Metadata_Types\Core_Description',
-                'status'        => 'publish',
-            	'exposer_mapping'	=> [
-            		'dublin-core' => 'description'
-            	]
-            ],
-            'core_title'       => [
-                'name'          => 'Title',
-                'description'   => 'title',
-                'collection_id' => $collection->get_id(),
-                'metadata_type'    => 'Tainacan\Metadata_Types\Core_Title',
-                'status'        => 'publish',
-            	'exposer_mapping'	=> [
-            		'dublin-core' => 'title'
-            	]
-            ]
-        ];
-
-        if( $collection->get_parent() != 0 ){
-
-        	if(!empty($metadata)){
-		        foreach ( $data_core_metadata as $index => $data_core_metadatum ) {
-		        	foreach ( $metadata as $metadatum ){
-		        		if ( $metadatum->get_metadata_type() === $data_core_metadatum['metadata_type'] ) {
-		        			update_post_meta($metadatum->get_id(), 'metadata_type', 'to_delete', $data_core_metadatum['metadata_type']);
-		        			wp_delete_post($metadatum->get_id(), true);
-		        		}
-		        	}
-		        }
-	        }
-
-            return false;
-        }
+	    $data_core_metadata = $this->get_data_core_metadata($collection);
 
         foreach ( $data_core_metadata as $index => $data_core_metadatum ) {
             if( empty( $metadata ) ){
diff --git a/src/classes/repositories/class-tainacan-repository.php b/src/classes/repositories/class-tainacan-repository.php
index 30f5f26b2..d24f8a2a3 100644
--- a/src/classes/repositories/class-tainacan-repository.php
+++ b/src/classes/repositories/class-tainacan-repository.php
@@ -77,8 +77,15 @@ abstract class Repository {
 			// TODO: Throw Warning saying you must validate object before insert()
 		}
 
-		$is_update = false;
-		$diffs     = [];
+		$is_update         = false;
+		$is_updated_parent = false;
+		$old               = '';
+
+		if ( $obj instanceof Entities\Collection && $obj->get_status() != 'auto-draft' ) {
+			$is_updated_parent = true;
+		}
+
+		$diffs = [];
 		if ( $obj->get_id() ) {
 
 			$old = $obj->get_repository()->fetch( $obj->get_id() );
@@ -109,15 +116,15 @@ abstract class Repository {
 			$obj->WP_Post->post_status = 'publish';
 		}
 
-		if( $obj instanceof Entities\Item ){
+		if ( $obj instanceof Entities\Item ) {
 			// get collection to determine post type
 			$collection = $obj->get_collection();
 
-			if ( !$collection ) {
+			if ( ! $collection ) {
 				return false;
 			}
 
-			$post_t = $collection->get_db_identifier();
+			$post_t                  = $collection->get_db_identifier();
 			$obj->WP_Post->post_type = $post_t;
 		}
 
@@ -134,8 +141,11 @@ abstract class Repository {
 			}
 		}
 
-		// TODO: Logs for header image insert and update
+		if($is_updated_parent){
+			do_action('tainacan-collection-parent-updated', $old, $obj);
+		}
 
+		// TODO: Logs for header image insert and update
 		do_action( 'tainacan-insert', $obj, $diffs, $is_update );
 		do_action( 'tainacan-insert-' . $obj->get_post_type(), $obj );
 
diff --git a/tests/factories/class-tainacan-item-metadata-factory.php b/tests/factories/class-tainacan-item-metadata-factory.php
index 6276519f7..d77d75a70 100644
--- a/tests/factories/class-tainacan-item-metadata-factory.php
+++ b/tests/factories/class-tainacan-item-metadata-factory.php
@@ -7,16 +7,16 @@ class Item_Metadata_Factory {
 
 	public function create_item_metadata(\Tainacan\Entities\Item $item, \Tainacan\Entities\Metadatum $metadatum, $value = ''){
 		$Tainacan_Item_Metadata = \Tainacan\Repositories\Item_Metadata::get_instance();
-        $item_metadata = new \Tainacan\Entities\Item_Metadata_Entity($item, $metadatum);
+        $this->item_metadata = new \Tainacan\Entities\Item_Metadata_Entity($item, $metadatum);
         
         if (!empty($value))
-            $item_metadata->set_value($value);
+            $this->item_metadata->set_value($value);
         
-        if ($item_metadata->validate()) {
-            $item_metadata = $Tainacan_Item_Metadata->insert($item_metadata);
+        if ($this->item_metadata->validate()) {
+            $this->item_metadata = $Tainacan_Item_Metadata->insert($this->item_metadata);
         } 
         
-        return $item_metadata; // If not validated, get_error() method should return the errors. Its up to the tests to use it or not
+        return $this->item_metadata; // If not validated, get_error() method should return the errors. Its up to the tests to use it or not
         
 	}
 }
diff --git a/tests/test-core-metadatum-types.php b/tests/test-core-metadatum-types.php
index e5eac0888..01e78cc18 100644
--- a/tests/test-core-metadatum-types.php
+++ b/tests/test-core-metadatum-types.php
@@ -208,5 +208,132 @@ class CoreMetadatumTypes extends TAINACAN_UnitTestCase {
 
 
     }
+
+    function test_collection_parent_change_and_update_core_metadata(){
+	    $Tainacan_Collections = \Tainacan\Repositories\Collections::get_instance();
+
+	    $collection_parent2 = $this->tainacan_entity_factory->create_entity(
+		    'collection',
+		    array(
+			    'name'   => 'Parent2',
+			    'status' => 'publish'
+		    ),
+		    true
+	    );
+
+	    $collection_parent = $this->tainacan_entity_factory->create_entity(
+		    'collection',
+		    array(
+			    'name'   => 'Parent',
+			    'status' => 'publish'
+		    ),
+		    true
+	    );
+
+	    $collection_parent_item = $this->tainacan_entity_factory->create_entity(
+		    'item',
+		    array(
+			    'title'       => 'Par',
+			    'description' => 'par',
+			    'status' => 'publish',
+			    'collection'  => $collection_parent,
+		    ),
+		    true
+	    );
+
+	    $core_metadata_parent = $collection_parent->get_core_metadata();
+
+	    $item_metadatum_title0 = $this->tainacan_item_metadata_factory->create_item_metadata(
+	    	$collection_parent_item,
+		    $core_metadata_parent[1], 'Son of son');
+
+	    $item_metadatum_desc0 = $this->tainacan_item_metadata_factory->create_item_metadata(
+	    	$collection_parent_item, $core_metadata_parent[0],
+		    'Desc of son of son');
+
+	    $collection_son = $this->tainacan_entity_factory->create_entity(
+	    	'collection',
+		    array(
+		    	'name' => 'Son',
+			    'status' => 'publish'
+		    ),
+		    true
+	    );
+
+	    $core_metadata_son = $collection_son->get_core_metadata();
+
+	    # Creates a item
+	    $collection_son_item = $this->tainacan_entity_factory->create_entity(
+	    	'item',
+		    array(
+		    	'title'       => 'Son of son',
+		    	'description' => 'Desc of son of son',
+		    	'collection'  => $collection_son,
+			    'status' => 'publish'
+		    ),
+		    true
+	    );
+
+	    $item_metadatum_title = $this->tainacan_item_metadata_factory->create_item_metadata($collection_son_item,
+		    $core_metadata_son[1], 'Son of son');
+
+	    $item_metadatum_desc = $this->tainacan_item_metadata_factory->create_item_metadata($collection_son_item, $core_metadata_son[0],
+		    'Desc of son of son');
+
+	    $this->assertEquals($core_metadata_son[0]->get_id(), $item_metadatum_desc->get_metadatum()->get_id());
+	    $this->assertEquals($core_metadata_son[1]->get_id(), $item_metadatum_title->get_metadatum()->get_id());
+
+	    $this->assertNotEquals($core_metadata_parent[0]->get_id(), $item_metadatum_desc->get_metadatum()->get_id());
+	    $this->assertNotEquals($core_metadata_parent[1]->get_id(), $item_metadatum_title->get_metadatum()->get_id());
+
+	    # When updated the parent, the item metadata key, have to be update too
+	    $collection_son->set_parent($collection_parent->get_id());
+
+	    $collection_son->validate();
+	    $collection_son = $Tainacan_Collections->update($collection_son);
+
+	    $core_metadata_son = $collection_son->get_core_metadata();
+
+	    $this->assertNotEquals($core_metadata_son[0]->get_id(), $item_metadatum_desc->get_metadatum()->get_id());
+	    $this->assertNotEquals($core_metadata_son[1]->get_id(), $item_metadatum_title->get_metadatum()->get_id());
+
+	    $it = get_post_meta($collection_son_item->get_id());
+
+	    $this->assertArrayHasKey($core_metadata_parent[0]->get_id(), $it);
+	    $this->assertArrayHasKey($core_metadata_parent[1]->get_id(), $it);
+
+	    # Changes parent again
+	    $collection_son->set_parent(0);
+
+	    $collection_son->validate();
+	    $collection_son = $Tainacan_Collections->update($collection_son);
+
+	    $core_metadata_son2 = $collection_son->get_core_metadata();
+
+	    $it2 = get_post_meta($collection_son_item->get_id());
+
+	    $this->assertArrayHasKey($core_metadata_son2[0]->get_id(), $it2);
+	    $this->assertArrayHasKey($core_metadata_son2[1]->get_id(), $it2);
+
+	    $this->assertArrayNotHasKey($core_metadata_parent[0]->get_id(), $it2);
+	    $this->assertArrayNotHasKey($core_metadata_parent[1]->get_id(), $it2);
+
+	    # Changes parent again
+	    $collection_son->set_parent($collection_parent2->get_id());
+
+	    $collection_son->validate();
+	    $collection_son = $Tainacan_Collections->update($collection_son);
+
+	    $core_metadata_son3 = $collection_son->get_core_metadata();
+
+	    $it3 = get_post_meta($collection_son_item->get_id());
+
+	    $this->assertArrayHasKey($core_metadata_son3[0]->get_id(), $it3);
+	    $this->assertArrayHasKey($core_metadata_son3[1]->get_id(), $it3);
+
+	    $this->assertArrayNotHasKey($core_metadata_parent[0]->get_id(), $it3);
+	    $this->assertArrayNotHasKey($core_metadata_parent[1]->get_id(), $it3);
+
+    }
     
 }
\ No newline at end of file
diff --git a/webpack.config.js b/webpack.config.js
index 39026be39..473f07db9 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -81,7 +81,7 @@ const production = false;
 if (production === true) {
     const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
 
-    console.log({'production': production});
+    console.log(`production: ${production}`);
 
     module.exports.mode = 'production';
 
@@ -109,7 +109,7 @@ if (production === true) {
         }
     }
 } else {
-    console.log({'production': production});
+    console.log(`production: ${production}`);
 
     module.exports.devtool = '';