SAP PI: Object locking issue and don't find in Administration -->Lock Overview

Hi,

In Quality environment one of my colleague did some changes in communication channel using aid -temporary id which is used for QA/PROD changes with approval and this user id will be deactivated after changes, but some how that communication channel is locked with aid and even we tried by activating the temporary user id to unlock that but no object appear in administration-->directory-->lock overview. Questions for you

1. is there any other way to unlock object other than administration-->directory-->lock overview

Note: I tried with PISUPER user but we don't see any locked objects.

Regards

satish