Error "InvalidOperationException: This cannot be used during play mode." is logged when changing Variant in Play Mode

Steps to reproduce:

1. Open the attached Project
2. Open Scene "SampleScene"
3. Enter Play Mode & select the Cube GameObject
4. In the Inspector change the Variant under the Ghost Authoring Inspection Component

Actual results: Error "InvalidOperationException: This cannot be used during play mode." is logged

Expected results: Dropdown menu is disabled in Play Mode

Reproducible with versions: 6000.7.0a3

Can’t test with versions: 6000.0.0f1, 6000.0.80f1, 6000.3.18f1, 6000.5.6f1, 6000.6.0b6 (No Variant dropdown)

Tested on (OS): Windows 11