The following error is generated in the console after specific repro steps of adding an event, then changing an option of a clip…

Transferring default clips failed, target already has clips
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&) (at /Users/bokken/buildslave/unity/build/Modules/IMGUI/GUIUtility.cs:189)

This only happens when using the RMB-Click contextual menu “Add Animation Event”. This bug is not repro using the add event button.

Repro:
- Select any FBX with at least one animation clip in your Project folder
- In the Importer (Inspector) > Animation tab…
- Expand the Events section
- RMB-Click the time ruler and select “Add Animation Event”
- Collapse the Events section
- Click the Loop Time option (or any other option)…
Bug: error in the console.
Expected: no error.

see attached gif

Note: Functionality is not impacted, but error is undesired.

Not a regression from what I can tell.