Fatal error: Uncaught Error: Class "craft\migrations\BaseFieldMergeMigration" not found in /home/pivotdes/dev.pivot.design/migrations/m260512_131137_merge_background6_into_background2.php:11 Stack trace: #0 {main} thrown in /home/pivotdes/dev.pivot.design/migrations/m260512_131137_merge_background6_into_background2.php on line 11