How to reproduce:
1. Create and open a new project
2. Open Edit > Shortcuts
3. Filter the view by typing "Scene View/" into the search bar in the Shortcut Manager
4. Find the shortcut "Scene View/Toggle 2D Mode" (or any other Scene view-related shortcut)
5. Bind the shortcut to the Middle Mouse Button (create the conflict if asked)
6. In the Scene view, click the Middle Mouse Button to invoke the Shortcut Conflict window
7. Select any of the rows in the Shortcut Conflict window
8. Check the “Rebind to selected command“ checkbox
9. Click the "Perform Selected" button
10. Observe the Console

Expected result: The conflict is resolved without an error
Actual result: 6 errors appear in pairs of 2

Reproducible in: 6000.0.16f1, 6000.0.37f1, 6000.1.0b5, 6000.2.0a2
Not reproducible in: 2022.3.57f1, 6000.0.15f1

Reproduced on: Windows 11 Pro (23H2)
Not reproduced on: No other environment tested

Notes:
- Each error of the pair reads:
1. “ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.“
2. “GUI Error: You are pushing more GUIClips than you are popping. Make sure they are balanced.”
- The errors continue to be thrown until the shortcut (or the bound action) is triggered
- At least two shortcuts have to be set to the same key to cause a conflict
- Regression seems to have started when the Shortcut Helper Bar was introduced