Steps to reproduce:

1. Create a new project using Universal 3D Template
2. Go to Edit > Preferences > General and enable "Use new Hierarchy window"
3. Go to Edit > Project Settings > UI Toolkit and enable "Enable Hierarchy Integration"
4. In the Hierarchy, right-click > UI Toolkit > UI Document with Asset
5. Open the created uxml asset in the UI Builder
6. From Library in "Numeric Fields" drag a "Integer" field to Hierarchy
7. Save and close the UI Builder
8. In the Hierarchy, fully expand the "UIDocument" GameObject
9. Click on the "IntegerInput" GameObject
10. Observe the Console

Actual results: "ArgumentOutOfRangeException: index of -1 should be in the range of 0 and 63 inclusively." error is thrown

Expected results: no errors

Reproducible with versions: 6000.5.0a1, 6000.5.0a6

Not reproducible with versions: 6000.3.7f1, 6000.4.0a3, 6000.4.0b7

Tested on (OS): Windows 11

Notes:

• Reproduces with other fields from the Numeric Field foldout as well