diff --git a/src/classes/entities/class-tainacan-item.php b/src/classes/entities/class-tainacan-item.php
index b00512513..e9be93f5a 100644
--- a/src/classes/entities/class-tainacan-item.php
+++ b/src/classes/entities/class-tainacan-item.php
@@ -210,6 +210,13 @@ class Item extends Entity {
             $arrayItemMetadata = $this->get_fields();
             if( $arrayItemMetadata  ){
                 foreach ( $arrayItemMetadata as $itemMetadata ) {
+
+                    // avoid core fields to re-validate
+                    $pos = strpos($itemMetadata->get_field()->get_field_type(), 'Core');
+                    if( $pos !== false ){
+                        continue;
+                    }
+
                     if( !$itemMetadata->validate() ){
                         $errors = $itemMetadata->get_errors();
                         $this->add_error( $itemMetadata->get_field()->get_name(), $errors );
@@ -221,4 +228,15 @@ class Item extends Entity {
         }
         return false;
     }
+
+    /**
+     * {@inheritDoc}
+     * @see \Tainacan\Entities\Entity::validate()
+     */
+    public function validate_core_fields(){
+        if ( !in_array($this->get_status(), apply_filters('tainacan-status-require-validation', ['publish','future','private'])) )
+            return true;
+
+        return parent::validate();
+    }
 }
\ No newline at end of file
diff --git a/src/classes/repositories/class-tainacan-fields.php b/src/classes/repositories/class-tainacan-fields.php
index 72f35774b..a08dc44ed 100644
--- a/src/classes/repositories/class-tainacan-fields.php
+++ b/src/classes/repositories/class-tainacan-fields.php
@@ -289,8 +289,6 @@ class Fields extends Repository {
 	 * @throws \Exception
 	 */
     public function fetch_by_collection(Entities\Collection $collection, $args = [], $output = null){
-        $this->register_core_fields( $collection );
-
         $collection_id = $collection->get_id();
 
         //get parent collections
diff --git a/src/classes/repositories/class-tainacan-item-metadata.php b/src/classes/repositories/class-tainacan-item-metadata.php
index 072d14e36..19455a9d2 100644
--- a/src/classes/repositories/class-tainacan-item-metadata.php
+++ b/src/classes/repositories/class-tainacan-item-metadata.php
@@ -64,7 +64,7 @@ class Item_Metadata extends Repository {
             $set_method = 'set_' . $field_type->related_mapped_prop;
             $value = $item_metadata->get_value();
             $item->$set_method( is_array( $value ) ? $value[0] : $value );
-            if ($item->validate()) {
+            if ($item->validate_core_fields()) {
                 global $Tainacan_Items;
                 $Tainacan_Items->insert($item);
             } else {
diff --git a/src/dev-interface/class-tainacan-dev-interface.php b/src/dev-interface/class-tainacan-dev-interface.php
index ead6ce542..98aac33b7 100644
--- a/src/dev-interface/class-tainacan-dev-interface.php
+++ b/src/dev-interface/class-tainacan-dev-interface.php
@@ -475,6 +475,12 @@ class DevInterface {
                 
                 foreach ($metalist as $meta) {
                     $item_meta = new \Tainacan\Entities\Item_Metadata_Entity($entity, $meta);
+
+                    $pos = strpos($item_meta->get_field()->get_field_type(), 'Core');
+                    if( $pos !== false ){
+                        continue;
+                    }
+
                     if (isset($_POST['tnc_metadata_' . $meta->get_id()])) {
                         $item_meta->set_value($_POST['tnc_metadata_' . $meta->get_id()]);
                         if ($item_meta->validate()) {