-455   IN CREATE FUNCTION FOR function-name, THE SCHEMA NAME schema-name1 PROVIDED FOR THE SPECIFIC NAME DOES NOT MATCH THE SCHEMA NAME schema-name2 OF THE FUNCTION

If the SPECIFIC name is specified as a two part name, the schema-name1 portion must be the same as the schema-name2 portion of the function-name. Note that the schema-name2 portion of function-name may have been specified directly or it may have defaulted to the authorization ID of the statement.