Hi, Jerome,
We do not support removal of OPM from UM.
When you run into your current scenario, from cloning or backup/restore of OPM, you need to
1. Shutdown the OPM that you no longer need, in your case, cronos.
2. You will still see this OPM from the Dashboard\Performance tab. If you attempt to access this OPM by clicking on it, it will still try to load it but nothing will come up. We will document this.
Hope this helps.
Julia