-456 IN CREATE FUNCTION FOR function-name, THE SPECIFIC NAME specific-name ALREADY EXISTS IN THE SCHEMA
Explanation
A SPECIFIC name has been explicitly specified as specific-name in the CREATE FUNCTION statement for function-name, but this name already exists as the SPECIFIC name for another function within the schema.
System action
The statement cannot be processed.
Programmer response
Choose a new SPECIFIC name.
SQLSTATE
42710