# Error 1830: Column cannot be NOT NULL: needed in a foreign key constraint SET NULL

| Error Code | SQLSTATE | Error                     | Description                                                                      |
| ---------- | -------- | ------------------------- | -------------------------------------------------------------------------------- |
| 1830       | HY000    | ER\_FK\_COLUMN\_NOT\_NULL | Column '%s' cannot be NOT NULL: needed in a foreign key constraint '%s' SET NULL |

## Possible Causes and Solutions

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