Problem sloved. I installed the wrong repo! Thanks.well https://www.google.com/search?q=_multiprocessing.SemLock+repo&oq=_multiprocessing.SemLock+repo first result https://forum.developer.parrot.com/t/repo-sync-permission-denied/9341 suggests it's a permission error. try that.
also i am not sure that repo is still supposed to run on python2. try python3.