Oracle has desupported cmclean.sql which used to clear out the concurrent queues after a clone. You can apply the patch for cpadmin.sh and do the same thing with that shell script.
EBS Concurrent Processing (CP) Analyzer (Doc ID 1411723.1)
Concurrent Processing - Command-Line Utility OR Recovery Wizard (Doc ID 134007.1)
21085588:R12.FND.B BACKPORT OF CONCURRENT MANAGER UTILITY