12.2 ADOP Prepare Phase Fails with message ERROR Domain might be locked by some other WLS user process

txkADOPValidations.log
" [ERROR]: Domain might be locked by some other WLS user process"
Sol
1. Start the admin server on the run file system (if not started already).
2. Login in to WLS Admin Console (http(s)://hostname.domain:<adminport>/console)
3. Click on "Release Configuration" button at "Change Center" on the top left corner.
4. Logout of WLS console
5. Rerun the adop phase=prepare