MySQL error code

MySQL error 6124

MySQL server error 6124 is ER_WARN_DEPRECATED_NON_STANDARD_KEY, reported with SQLSTATE HY000.

Foreign key '%s' refers to non-unique key or partial key. This is deprecated and will be removed in a future release.

Error	6124
Name	ER_WARN_DEPRECATED_NON_STANDARD_KEY
SQLSTATE	HY000
Group	Server errors