Assertion failed exception is thrown continuously on clicking the Create Range button in the Preset of Sprite Shape Profile asset when Undo/Redo operation is performed earlier, Refer attached video.

Steps to repro:
1. Create a new project with a 2D Template
2. Project window > Create > 2D > Sprite Shape Profile
3. Create a preset of Sprite Shape Profile
4. SpriteShape preset > Inspector > Reset
5. Edit > Undo Edit SpriteShape > Redo Reset SpriteShape
6. Click on the "Create Range" button

Actual Result:
Assertion failed exception is thrown continuously in the console.

Expected Result:
Angle Range is created gracefully without any exception thrown in the console.

Note: "Create Range" button is available from Package Version 5.0.1 and Unity version 2020.2.0b1

Reproducible in:
2021.1.07, 2020.2.0b13, 2020.2.0b1 with Package Version 5.1.0, 5.0.1.

Environment:
Occurring on Windows 10 & Mac 10.15.

Stack trace:
Assertion failed
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)