“Failed to parse data …“ and “Invalid Script reference …” errors appear in the Console when importing specific assets

How to reproduce:
1. Create a new project
2. Drag and drop into /Assets the custom package: “IN-112289_ModelBug.unitypackage”
3. When prompted to import the package, click “Import”
4. Observe the Console

Expected result: No errors appear in the Console
Actual result: “Failed to parse data …“ and “Invalid Script reference …” errors are shown in the Console

Reproducible with: 6000.2.0a10, 6000.2.3f1, 6000.3.0b1 (fcdf07aae9b4)
Not reproducible with: 6000.0.57f1, 6000.2.0a7
Could not test with: 6000.2.0a8, 6000.2.0a9 (crashes instead)

Reproducible on: Windows 11
Not reproducible on: No other environments tested

Notes:

• To see if the errors appear, remove the package (Assets/MODELS) and re-open the project
• The errors do not appear if the project already has the package assets imported