# Error 1904: Key/Index cannot be defined on a virtual generated column

| Error Code | SQLSTATE | Error                                          | Description                                               |
| ---------- | -------- | ---------------------------------------------- | --------------------------------------------------------- |
| 1904       |          | ER\_KEY\_BASED\_ON\_GENERATED\_VIRTUAL\_COLUMN | Key/Index cannot be defined on a virtual generated column |

## Possible Causes and Solutions

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