Replace Prefab variant parent creates unused overrides for the instance in the scene

Steps:
1. Create a variant instance in the scene
2. Open it in context
3. Drag root instance to the Project Browser
4. Choose "Replace Variant Parent"
5.Save
6. Go back to scenes
7. Select variant instance and look at Overrides window
==>
It contains 12 unused overrides (they were default overrides previuosly)