MySQL error code
MySQL error 1056
MySQL server error 1056 is ER_WRONG_GROUP_FIELD, reported with SQLSTATE 42000.
Can't group on '%s'
| Error | 1056 |
|---|---|
| Name | ER_WRONG_GROUP_FIELD |
| SQLSTATE | 42000 |
| Group | Server errors |
In other databases
Source: MySQL 8.4 Error Reference