Modeler is trying to load the class which is not present in diagram

I have made this bpmn diagram parallel.bpmn (16.4 KB)
You can check in the xml also that class named Federation is not been defined anywhere in it, reagardless of that, everytime I execute my program, after CEO user aproval’s, it is finding Federation named java class to work upon my service tasks.
this is the logs for reference error log.txt (71.6 KB)

But if I change my Java class name to Federation of any one service task, then It is working fine. Not sure why this is happening.

Thanks if someone can help me out !