How to reproduce:
1. Open the attached “IN-99613” project
2. In the Project window navigate to the “Pallettes” folder (Assets/Art/Palettes)
3. Select any of the GameObjects in the “Palettes” folder
4. Observe the Console window

Expected result: No errors appear in the Console window
Actual result: 2 “Assertion failed on expression” errors appear in the Console window

Reproducible with: 6000.0.45f1, 6000.0.49f1, 6000.1.0f1, 6000.2.0a10
Not reproducible with: 2021.3.51f1, 2022.3.61f1, 6000.0.44f1

Reproduced on: Windows 11, macOS 15.4 (Sequoia) (User)
Not reproduced on: No other environment tested

Note: The errors also appear when entering Play mode after selecting the “CityMap” Scene