Update DB
we are on stretch and seem to run an older version of MariaDB
root@heu2:/etc/cron.d# apt list --upgradable
Listing... Done
mariadb-client-10.1/oldoldstable 10.1.48-0+deb9u2 amd64 [upgradable from: 10.1.48-0+deb9u1]
mariadb-client-core-10.1/oldoldstable 10.1.48-0+deb9u2 amd64 [upgradable from: 10.1.48-0+deb9u1]
mariadb-common/oldoldstable 10.1.48-0+deb9u2 all [upgradable from: 10.1.48-0+deb9u1]
mariadb-server/oldoldstable 10.1.48-0+deb9u2 all [upgradable from: 10.1.48-0+deb9u1]
mariadb-server-10.1/oldoldstable 10.1.48-0+deb9u2 amd64 [upgradable from: 10.1.48-0+deb9u1]
mariadb-server-core-10.1/oldoldstable 10.1.48-0+deb9u2 amd64 [upgradable from: 10.1.48-0+deb9u1]