# Error 1557: Upholding foreign key constraints for table, entry, key would lead to a duplicate entry

| Error Code | SQLSTATE | Error                       | Description                                                                                          |
| ---------- | -------- | --------------------------- | ---------------------------------------------------------------------------------------------------- |
| 1557       | 23000    | ER\_FOREIGN\_DUPLICATE\_KEY | Upholding foreign key constraints for table '%s', entry '%s', key %d would lead to a duplicate entry |

## Possible Causes and Solutions

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