Hi! Thanks for spotting this. This actually means that due to changes in how the apt resolver works, upgrades from Bookworm to Forky are broken for anyone running MariaDB. I wonder what the specific change in the resolver was that caused this, and if it was intentional or not, and if this should be fixed by adjusting the resolver or redoing the 'default-mysql-server' or 'mariadb-server' dependencies.