"SelectorAccelerationCache ... change was not notified" error is thrown and the StyleSheet disappears when undoing twice after applying a dragged selector

Steps to reproduce:

1. Create a new URP project
2. In the Hierarchy, right-click and select UI Toolkit > Standard Elements > Visual Element
3. Observe UI Viewport and Style Sheets windows open
4. In the Style Sheets window, create a new selector (with a new StyleSheet)
5. Drag the selector onto the Visual Element
6. Save (Cmd+S)
7. Click Undo twice (Cmd+Z)
8. Observe the Console and Style Sheets window

Actual results: "SelectorAccelerationCache: ee (entityId=25916:768) has changed but change was not notified to SelectorAccelerationCache, please report a bug. Previous hash 480775826, new hash=-1690491964" error is thrown and Style Sheets window does not show the created StyleSheet anymore

Expected results: no errors are thrown

Reproducible with versions: 6000.6.0b1, 6000.7.0a1

Can’t test with versions: 6000.4.12f1, 6000.5.1f1 (uxml editing In Context not available)

Tested on (OS): macOS 26.5