"New Decal.mat has no meta file, but it's in an immutable folder" error is thrown when creating a new Material for a Decal Projector after clicking the default Decal Material

Steps to reproduce:

1. Create a new Unity project using the Universal 3D template
2. Create a new Decal Projector GameObject (GameObject > Rendering > URP Decal Projector)
3. Select the new created Decal Projector GameObject in the Hierarchy window
4. Click on the "Decal" Material property
5. Click the "New" button to create a new Decal Material
6. Observe the Console window

Actual results: "New Decal.mat has no meta file, but it's in an immutable folder. The asset will be ignored." error is thrown

Expected results: Either a warning/popup that the Material cannot be created in this folder or create the new Material in the default Assets folder

Reproducible with versions: 6000.0.53f1, 6000.1.11f1, 6000.2.0b9, 6000.3.0a1

Can’t test with versions: 2021.3.51f1, 2022.3.64f1 ("New" button does not exist in these versions)

Tested on (OS): macOS Silicon Sequoia 15.5