Reproduction steps:
1. Create a Canvas gameobject in the Hierarchy: Create -> UI -> Canvas
2. Drag the Canvas to the Project to create a Prefab
3. In the Inspector of the Canvas Prefab set PosX to a non-zero value: E.g 150
4. Now right click on the Canvas Prefab and select Create > Prefab Variant
Expected results: No errors shown in the Console
Actual results: Console shows the error: "Assertion failed on expression: 'modifications.empty()'"
Reproducible on: Windows 11 Pro
Not reproducible on: No other environments tested