*Steps to reproduce:*

1. Import an SVG file

2. Ensure that its Generated Asset Type is set to Vector Sprite in the import settings

3. Drag the SVG prefab into the Hierarchy

4. Select the SVG asset and change its Generated Asset Type to Textured Sprite or Texture2D and Apply

5. Observe the prefab from step 3 in the Hierarchy - it's missing the prefab reference

*Actual results:* The prefab reference is lost when changing from Vector Sprite to a different Asset Type

*Expected results:* The prefab reference is preserved (or at least a warning is logged that changing types will produce breaking changes)

*Reproducible with versions:* 2.0.0-preview.23, 2.0.0-preview.24

*Editor versions tested:* 2021.3.34f1, 2022.3.19f1, 2023.3.0b7

*Tested on (OS):* Windows 11, MacOS