Being practical, do you need to retain it? To give background to the duplicate copies of the Operations and License Monitor apps, when a Qlik Sense site is upgraded:
A newer copy of the Ops and License Monitor apps are imported
The current published copies are duplicated
This means any unpublished sheets are not retained in this duplicate
This does mean any script related changes are retained
The newer copy is published over the published copy
The duplicate is renamed to match the version of app
All in all if you haven't adjusted the script of the apps, then there is nothing of value in the duplicate copy.
If you do need to retain some of the script changes then do let the forum know and the pros from Support can provide insight into how to debug.