The maintainer of the packages.sury.org repository, which is mostly used for PHP packages, has made a change to the content distribution of the repository. This results in packages for Debian 12 (Bookworm) being pushed to Debian 11 (Bullseye) systems. When running apt update, you will see this warning: Code: root@testbak:~# apt update Hit:1 https://rspamd.com/apt-stable bullseye InRelease Hit:2 http://mirror.hetzner.com/debian/packages bullseye InRelease Hit:3 http://mirror.hetzner.com/debian/packages bullseye-updates InRelease Hit:4 http://mirror.hetzner.com/debian/security bullseye-security InRelease Hit:5 http://security.debian.org/debian-security bullseye-security InRelease Hit:6 http://deb.debian.org/debian bullseye InRelease Hit:7 http://deb.debian.org/debian bullseye-updates InRelease Get:8 https://packages.sury.org/php bullseye InRelease [6,796 B] Hit:9 https://repo.dovecot.org/ce-2.3-latest/debian/bullseye bullseye InRelease N: Repository 'https://packages.sury.org/php bullseye InRelease' changed its 'Suite' value from 'bullseye/snapshots/1686817153' to 'bookworm/snapshots/1686830748' E: Repository 'https://packages.sury.org/php bullseye InRelease' changed its 'Codename' value from 'bullseye' to 'bookworm' N: This must be accepted explicitly before updates for this repository can be applied. See apt-secure(8) manpage for details. Do you want to accept these changes and continue updating from this repository? [y/N] Answer "N" and hit enter. Don't accept the changes. More in-depth info can be found here: https://github.com/oerdnj/deb.sury.org/issues/1972 I have alerted the maintainer and hope that this is quickly resolved. I will keep you up-to-date in the replies of this post, you can get a notification by watching this thread.
The issue seems to be resolved now. I just ran an update again and it shows correct values for Bullseye now.