MySQL error code
MySQL error 1855
MySQL server error 1855 is ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_HIDDEN_FTS, reported with SQLSTATE HY000.
Cannot replace hidden FTS_DOC_ID with a user-visible one
| Error | 1855 |
|---|---|
| Name | ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_HIDDEN_FTS |
| SQLSTATE | HY000 |
| Group | Server errors |
Source: MySQL 8.4 Error Reference