Upgrading MariaDB on Debian version 12 to version: 10.11.18-MariaDB-0+deb12u1 Debian 12 cases errors in journalctl. This section describes solution.

Correct it by reinstalling the plugins:

apt install --reinstall mariadb-plugin-provider-bzip2 
apt install --reinstall mariadb-plugin-provider-lz4 
apt install --reinstall mariadb-plugin-provider-lzma 
apt install --reinstall mariadb-plugin-provider-lzo 
apt install --reinstall mariadb-plugin-provider-snappy

Error when starting mariadb.service

/bin/sh: 1: cannot create /run/mysqld/wsrep-start-position: Permission denied

The socket /lib/systemd/system/mariadb.socket is started by sockets.target.wants before the service systemd-tmpfiles-setup.service! Due to this the directory /run/mysqld is already created with root:root ownership Due to this: /lib/systemd/system/mariadb.service breaks because it cannot write in /run/mysqld

There are two possible fixes:

Add the following in mariadb.service:

ExecStartPre=+/bin/sh -c "/usr/bin/chown mysql:mysql /run/mysqld"

Disable the socket, which was not used anyway in our setup

systemctl disable mariadb.socket