You can update PC_DATA_UNIQUEID with some new prefix value, and update pylastreservedid. On request generation, you can call GenerateID to get your next suffix ID.
Ex. your main prefix is WRK-. Your suffix will be WRKSFX-. Pega by default will call GenerateID on the prefix, and will generate something like WRK-123. You will need to call GenerateID on the suffix name before the prefix name, and pass both for the workpage creation.