How to reproduce:
1. Open the “AsepriteImporterTest“ project
2. In the Project window, click on “bunball.aseprite”
3. In the Inspector, set the Layer Import Mode to the Individual Layers
4. Click on “Apply”
5. Set the Layer Import Mode back to the Merge Frame
6. Click on “Apply”
7. Observe the “bunball.aseprite”

Expected result: The Import Mode changes successfully, and the aseprite file remains usable
Actual Result: The “bunball.aseprite” file becomes unusable, and the following error is thrown: “Failed to import file Assets/bunball.aseprite. Error: Index was outside the bounds of the array

Reproducible in: 1.1.6, 1.1.8, 1.2.3 (2022.3.61f1, 6000.0.43f1, 6000.1.0b11, 6000.2.0a7)
Not reproducible in: 1.1.5 (2022.3.61f1, 6000.0.43f1, 6000.1.0b11, 6000.2.0a7)

Reproduced on: Windows 10, Windows 11 (user’s)
Not reproduced on: No other environment tested

Notes:
- Deleting “bunball.aseprite.meta” in the File Explorer makes the file usable again