hi @Wertandrew ,
There are two methods that have been used in past
Creative 2.0
UEFN
In both cases “Simulate New User” Edit Session/ Playtest Save and Publish.
My find was in FC2 and someone else found the UEFN versions
Next try
UEFN - Content Service (epicgames.com)
Select Project
Click your Project
Click Persistence
Click Delete to remove your Persistent data or Export for later then reimport