"OverflowException" is thrown and "Add Default Preset" dropdown menu does not open when clicking "Add Default Preset" in Preset Manager Project Settings

Steps to reproduce:

1. Create a new URP 3D project
2. Go to Edit > Project Settings
3. Navigate to the Preset Manager tab
4. Click on the "Add Default Preset" button
5. Observe the button and Console

Actual results: "OverflowException: Value was either too large or too small for an Int32." error and the button dropdown does not open

Expected results: Dropdown with choices opens below the button with no errors

Reproducible with versions: 6000.5.0b2, 6000.5.0b4, 6000.6.0a3

Not reproducible with versions: 6000.5.0b1

Tested on (OS): macOS 26.4, Ubuntu 24.04, Windows 11

Notes:

• Upgrading the project to broken versions doesn't break existing presets, but blocks from creating new ones