Maintainer scripts in 2023.4 remove the Bookworm key. Bookworm is the current Stable release.
Unpacking debian-archive-keyring (2023.4) over (2023.3) ...
Setting up debian-archive-keyring (2023.4) ...
Removing obsolete conffile /etc/apt/trusted.gpg.d/debian-archive-bookworm-stable.gpg ...
Removing obsolete conffile /etc/apt/trusted.gpg.d/debian-archive-bookworm-security-automatic.gpg ...
Removing obsolete conffile /etc/apt/trusted.gpg.d/debian-archive-bookworm-automatic.gpg ...
Perhaps this was meant to remove the keys of older releases instead?
Martin-Éric
-- System Information:
Debian Release: trixie/sid
APT prefers testing-debug
APT policy: (500, 'testing-debug'), (500, 'stable-security'), (500, 'testing')
Architecture: i386 (i686)
Kernel: Linux 6.1.0-12-686-pae (SMP w/1 CPU thread; PREEMPT)
Locale: LANG=fi_FI.UTF-8, LC_CTYPE=fi_FI.UTF-8 (charmap=UTF-8), LANGUAGE=fi:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
-- no debconf information