[2D] [PSB Importer] Resetting a rigged PSB sprite back to a normal PSB generates errors

Steps to Repro:
1. Import a PSB file for rigging
2. Set the PSB Sprite to Multiple and select Import Hidden Layers, Mosaic Layers, Character Mode, and Reslice From Layer
3. open the Sprite Editor and slice the sprite
4. use the Skinning Editor to create bones, generate meshes, and weight the sprites
5. go back to the Inspector settings of the PSB and unselect Import Hidden Layers, Mosaic Layers, Character Mode, Reslice from Slice and click Apply

The following error appears in the console:

AssetImporter is referencing an asset from the previous import. This should not happen.
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)