In der Nachricht vom Friday, 6 August 2021 03:25:58 CEST steht:
> Which Beowulf iso did you use? I think we fixed this in the 3.1.1
> point-release isos, but you still may hit it on an upgrade.

It happened on upgraded systems.

Thanx for fixing the ISO.

Don't you see a way to prevent the issue happening on upgraded systems, e.g.
blacklisting grub-efi-amd64-signed or using another mechanism?

Regards, Adrian.

BTW: I uninstalled grub-efi-amd64-signed without concern because of Debian bug
#906124 [https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=906124]