diff --git a/src/classes/class-tainacan-background-process.php b/src/classes/class-tainacan-background-process.php
index 1f932839d..1dfa5db38 100644
--- a/src/classes/class-tainacan-background-process.php
+++ b/src/classes/class-tainacan-background-process.php
@@ -104,6 +104,7 @@ abstract class Background_Process extends \Tainacan_WP_Background_Process {
 
 		if ( ! empty( $this->data ) ) {
 			global $wpdb;
+			$wpdb->query('START TRANSACTION');
 			$wpdb->insert(
 				$this->table, 
 				[
@@ -119,6 +120,7 @@ abstract class Background_Process extends \Tainacan_WP_Background_Process {
 				]
 			);
 			$this->ID = $wpdb->insert_id;
+			$wpdb->query('COMMIT');
 		}
 
 		return $this;
@@ -139,6 +141,7 @@ abstract class Background_Process extends \Tainacan_WP_Background_Process {
 			if (!isset($batch->output)) {
 				$batch->output = '';
 			}
+			$wpdb->query('START TRANSACTION');
 			$wpdb->update(
 				$this->table, 
 				[
@@ -150,6 +153,7 @@ abstract class Background_Process extends \Tainacan_WP_Background_Process {
 				],
 				['ID' => $key]
 			);
+			$wpdb->query('COMMIT');
 		}
 
 		return $this;
@@ -164,6 +168,7 @@ abstract class Background_Process extends \Tainacan_WP_Background_Process {
 	 */
 	public function open( $key ) {
 		global $wpdb;
+		$wpdb->query('START TRANSACTION');
 		$wpdb->update(
 			$this->table, 
 			[
@@ -171,6 +176,7 @@ abstract class Background_Process extends \Tainacan_WP_Background_Process {
 			],
 			['ID' => $key]
 		);
+		$wpdb->query('COMMIT');
 
 		return $this;
 	}
@@ -196,12 +202,13 @@ abstract class Background_Process extends \Tainacan_WP_Background_Process {
 			$params['progress_label'] = __('Process completed with errors','tainacan');
 			$params['progress_value'] = 100;
 		}
+		$wpdb->query('START TRANSACTION');
 		$wpdb->update(
 			$this->table, 
 			$params,
 			['ID' => $key]
 		);
-
+		$wpdb->query('COMMIT');
 		return $this;
 	}
 
@@ -214,10 +221,12 @@ abstract class Background_Process extends \Tainacan_WP_Background_Process {
 	 */
 	public function delete( $key ) {
 		global $wpdb;
+		$wpdb->query('START TRANSACTION');
 		$wpdb->delete(
 			$this->table, 
 			['ID' => $key]
 		);
+		$wpdb->query('COMMIT');
 		return $this;
 	}
 	
@@ -353,7 +362,8 @@ abstract class Background_Process extends \Tainacan_WP_Background_Process {
 				$task = $this->task( $task );
 			} catch (\Exception $e) {
 				// TODO: Add Stacktrace
-				$this->write_error_log($batch->key, [['datetime' => date("Y-m-d H:i:s"), 'message' => 'Fatal Error: ' . $e->getMessage()]]);
+				$this->debug('Fatal Error: ' . $e->getMessage());
+				$this->write_error_log($batch->key, [['datetime' => date("Y-m-d H:i:s"), 'message' => 'Try Fatal Error: ' . $e->getMessage()]]);
 				$this->write_error_log($batch->key, [['datetime' => date("Y-m-d H:i:s"), 'message' => 'Process aborted']]);
 				$task = false;
 				$close_status = 'errored';
@@ -398,9 +408,9 @@ abstract class Background_Process extends \Tainacan_WP_Background_Process {
 		global $wpdb;
 
 		$table  = $this->table;
-
+		$wpdb->query('START TRANSACTION');
 		$wpdb->query( $wpdb->prepare( "DELETE FROM {$table} WHERE done = FALSE AND action LIKE %s", $this->action ) ); // @codingStandardsIgnoreLine.
-
+		$wpdb->query('COMMIT');
 		return $this;
 	}
 
diff --git a/src/classes/libs/wp-background-process.php b/src/classes/libs/wp-background-process.php
index 4acd9cf8f..a9108964b 100644
--- a/src/classes/libs/wp-background-process.php
+++ b/src/classes/libs/wp-background-process.php
@@ -81,7 +81,7 @@
 		 * @var string
 		 * @access protected
 		 */
-		protected $cron_interval;
+		protected $cron_interval = 5;
 
 		/**
 		 * Initiate new background process
@@ -289,8 +289,11 @@
 		 * @return $this
 		 */
 		protected function unlock_process() {
-			$this->debug('unlocking process');
+			$this->debug('unlocking process: '. $this->identifier . '_process_lock');
+			global $wpdb;
+			$wpdb->query('START TRANSACTION');
 			delete_site_transient( $this->identifier . '_process_lock' );
+			$wpdb->query('COMMIT');
 
 			return $this;
 		}