How can I fix Error Code 1451

arjunmehta

MySQL Error Code 1451 occurs when you try to delete or update a parent record that is still referenced by rows in a child table. To fix it, first inspect your foreign key constraints to identify which table is blocking the operation. Remove or update the dependent child rows before modifying the parent record. If appropriate, adjust the foreign key to use ON DELETE CASCADE or ON UPDATE CASCADE, allowing MySQL to automatically manage related records. You can also clean up orphaned child rows that no longer match any parent entry. Once the constraints are satisfied, the delete or update will complete without triggering Error 1451.