# Error 1855: Cannot replace hidden FTS\_DOC\_ID with a user-visible one

| Error Code | SQLSTATE | Error                                                     | Description                                                |
| ---------- | -------- | --------------------------------------------------------- | ---------------------------------------------------------- |
| 1855       | HY000    | ER\_ALTER\_OPERATION\_NOT\_SUPPORTED\_REASON\_HIDDEN\_FTS | Cannot replace hidden FTS\_DOC\_ID with a user-visible one |

## Possible Causes and Solutions

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