What type of hardware are you using: Old laptop or computer
What YunoHost version are you running: 11.3.0.2 (stable)
How are you able to access your server: The webadmin
Are you in a special context or did you perform specific tweaking on your YunoHost instance ?: no
I am currently trying to run a migration from 11.3.0.2 to Debian Bookworm and YunoHost 12 but it seems to fail.
Thanks!
I think the error is this :
2026-03-02 18:07:28,751: ERROR - Migration 0027_migrate_to_bookworm did not complete, aborting.
Error: Your system is not fully up-to-date. Please perform a regular upgrade before running the migration to Bookworm.
You should upgrade your server before doing this migration.
Edit : it seems that 11.3.0.2 is the last version, so I do not know, sorry 
thanks for the suggestion, even if it isn’t the issue.
Just bumping this in the hopes that more eyes will get on this.
Alternatively should i consider starting fresh then loading application backups into the new system? Or would this be counter productive?
I’ve been conversing with people on the xmpp group chat and decided to document the solution here … first of all I had issue with the cryptographic keys, this command allowed me to update my system files as a first step:
sudo yunohost tools regen-conf -f
all system files are now up to date, but I have yet to run the migration
Yes, at the first lines of the logs, you can see that there are keys issues.
And there was a post about it : Yarn and Sury APT keys issues
unfortunately I’m now having issues with ‘grub-pc’ I think, but the command ‘sudo dpkg --configure -a’ doesn’t work, here is the latest log regarding the failed upgrade https://paste.yunohost.org/raw/qagamayufi