Unity Issue Tracker - [HDRP][DefaultProfile] Default Profile does not defaults back if the profile is deleted in the Project window

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Under Consideration for 6000.6.X

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[HDRP][DefaultProfile] Default Profile does not defaults back if the profile is deleted in the Project window

-

Mar 31, 2026

Steps to reproduce:

Download attached project and open in Unity.
Go to the Default Profile section: Project Settings >> Graphics >> HDRP >> Default Profile.
Change the DefaultSettingsVolumeProfile to ExteriorVolumeProfile.
Once the Confirmation Window shows up, click on Yes.
Delete the ExteriorVolumeProfile in the Project window.
Observe the Error in the Console: "Invalid VolumeProfile to obtain DiffusionProfileSettings".
Observe the Default Profile field is "None".

Actual results: Error in the Console: "Invalid VolumeProfile to obtain DiffusionProfileSettings". Default Profile field is "None".

Expected results: No error. Default Profile should fall back to some default profile, because it can't be empty.

Reproducible with versions:

6000.3.9f1, 6000.4.0b7, 6000.5.0a7, 6000.6.0a3

Tested on (OS):

MacBook Pro (16-inch, 2021), CPU: Apple M1 Max, Memory: 64 GB, macOS Tahoe: 26.1