# Error 1822: Failed to add the foreign key constaint. Missing index for constraint in the referenced

| Error Code | SQLSTATE | Error                     | Description                                                                                             |
| ---------- | -------- | ------------------------- | ------------------------------------------------------------------------------------------------------- |
| 1822       | HY000    | ER\_FK\_NO\_INDEX\_PARENT | Failed to add the foreign key constaint. Missing index for constraint '%s' in the referenced table '%s' |

## Possible Causes and Solutions

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