Release Channel Details - Blocked Quest Devices : Oculus Quest

I've got a yellow triangle with a black exclamation mark and the text 'Blocked Quest Devices : Oculus Quest' at the bottom of Dev dashboard -> Release Channel -> Alpha -> Details (below Build ID, Platform, Permissions, Max Android API Level etc).

Does anyone know what causes this warning triangle, or how to get rid of it?

The app runs on my Quest2, but not on the Quest1, and I'm thinking that this is the reason, but I can't find any documentation to troubleshoot this.

(Unity v2021.3.31f1, Oculus Utilities v1.88.0, OVRPlugin v1.88.0, SDK v1.0.27; app has passed DUC and company/developer is authorized.)

Thanks for any help.