How to reproduce:
1. Create a new Unity project
2. In the Hierarchy, right-click -> UI (Canvas) -> Button - TextMeshPro
3. In the Inspector, under the Button Component, change the Transition to Animation -> Auto Generate Animation
4. Press Ctrl +Z / Command + Z and observe the results
Expected results: The Transition changes
Actual results: No visual change happens because "AnyState Transition Created" action is undone which resutls in multiple "Parameter 'x' does not exist." warnings
Reproducible with: 6000.0.76f1, 6000.3.15f1, 6000.4.8f1, 6000.5.0b9, 6000.6.0a7
Reproducible on: macOS Tahoe 26 (M1)
Not reproducible on: No other environment tested
Note: This is considered a bug because the user gets no visual feedback on what action is undone and then missing parameters warnings are thrown even though the user might be not aware that something has changed