Merge branch '4.14' of https://github.com/craftcms/cms into 5.6

src/services/Gc.php

@@ -633,7 +633,7 @@ private function _deleteOrphanedFkRows(): void
                         } else {
                             $sql = <<<SQL
 DELETE FROM $table->name t
-WHERE t.$fkColumn IS NOT NULL
+WHERE t."$fkColumn" IS NOT NULL
 AND NOT EXISTS (
     SELECT * FROM $refTable
     WHERE "$pkColumn" = t."$fkColumn"