> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/server/reference/error-codes/mariadb-error-codes-1400-to-1499/e1451.md).

# Error 1451: Cannot delete or update a parent row: a foreign key constraint fails

| Error Code | SQLSTATE | Error                      | Description                                                               |
| ---------- | -------- | -------------------------- | ------------------------------------------------------------------------- |
| 1451       | 23000    | ER\_ROW\_IS\_REFERENCED\_2 | Cannot delete or update a parent row: a foreign key constraint fails (%s) |

## Possible Causes and Solutions

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