try different fkey name

Author: ferishili

lib/Helpers/PlaylistMigration.php

@@ -117,7 +117,7 @@ public static function convert()
                 DROP FOREIGN KEY `oc_playlist_ibfk_1`,
                 CHANGE COLUMN `config_id` `config_id` int NOT NULL,
                 CHANGE COLUMN `service_playlist_id` `service_playlist_id` varchar(64) UNIQUE NOT NULL,
-                ADD FOREIGN KEY `oc_playlist_ibfk_1` (`config_id`) REFERENCES `oc_config` (`id`) ON DELETE RESTRICT ON UPDATE RESTRICT'
+                ADD FOREIGN KEY `oc_playlist_ibfk_2` (`config_id`) REFERENCES `oc_config` (`id`) ON DELETE RESTRICT ON UPDATE RESTRICT'
             );
 
             // Forbid playlist video without related oc playlist entry