MySQL error code
MySQL error 3940
MySQL server error 3940 is ER_CONSTRAINT_NOT_FOUND, reported with SQLSTATE HY000.
Constraint '%s' does not exist.
| Error | 3940 |
|---|---|
| Name | ER_CONSTRAINT_NOT_FOUND |
| SQLSTATE | HY000 |
| Group | Server errors |
Source: MySQL 8.4 Error Reference