This is already out of scope for the bug report, but still leaving a note here that I filed https://salsa.debian.org/debian-keyring/website/-/merge_requests/17 in an effort to help others avoid having keyring update attempts fail.
- Bug#1140801: bookworm-pu: package xz-utils 5.4.... Otto Kekäläinen
- Processed: bookworm-pu: package xz-utils 5... Debian Bug Tracking System
- Bug#1140801: Acknowledgement (bookworm-pu:... Otto Kekäläinen
- Bug#1140801: Acknowledgement (bookworm... Otto Kekäläinen
- Bug#1140801: Acknowledgement (book... Adrian Bunk
- Bug#1140801: Acknowledgement (... Otto Kekäläinen
- Bug#1140801: Acknowledgem... Adrian Bunk
- Bug#1140801: Acknowle... Otto Kekäläinen
- Bug#1140801: Acknowledgem... Otto Kekäläinen
- Bug#1140801: Acknowle... Jonathan Wiltshire
- Bug#1140801: Acknowle... Otto Kekäläinen
- Bug#1140801: Acknowle... Adrian Bunk
- Bug#1140801: Ackn... Otto Kekäläinen
- Bug#1140801: Ackn... Otto Kekäläinen
- Bug#1140801: xz-utils 5.4.1-1+deb12u1 flag... Jonathan Wiltshire
- Processed: xz-utils 5.4.1-1+deb12u1 fl... Debian Bug Tracking System

