MySQL error code

MySQL error 3778

MySQL server error 3778 is ER_WARN_DEPRECATED_UTF8MB3_COLLATION, reported with SQLSTATE HY000.

'%s' is a collation of the deprecated character set UTF8MB3. Please consider using UTF8MB4 with an appropriate collation instead.

Error	3778
Name	ER_WARN_DEPRECATED_UTF8MB3_COLLATION
SQLSTATE	HY000
Group	Server errors