Cyclic nesting detected

Hello!
I am using 2018.3.0f2 and I am having problems with “Cyclic nesting detected” error.

I have a PRE-FAB and to modify it … I have to put it back into my scene. When I’m done, I want to put It back into my prefab folder and … here’s that error. I have to save the scene, restart Unity and then I can put it back in my pre-fab folder.

What I’m doing wrong?

Thanks!

Edit:

UnityEditorInternal.InternalEditorUtility:ProjectWindowDrag()
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)```

Thanks for updating icloud the thread. I was also facing the same and upon entering the thread your gimp edit helped me completely.

Thanks so much.
Regards.
Brian