Seaquel
MySQL error code

MySQL error 3951

MySQL server error 3951 is ER_DA_UDF_INVALID_ARGUMENT_TO_SET_CHARSET, reported with SQLSTATE HY000.

Character set can be set only for the UDF argument type STRING.
Error3951
NameER_DA_UDF_INVALID_ARGUMENT_TO_SET_CHARSET
SQLSTATEHY000
GroupServer errors

Source: MySQL 8.4 Error Reference