Yup that is why i did post the warning here! ( but to be honnest ofcourse i don’t know that part about webmin )
I was once strugling after update Mariadb , that the strict is default on in newer versions, therefore if do update for mainversion , but even other updates it takes more time but better read changelogs and understand them. Even then you could run into things not knowing how APP or plugin Developers programmed some, real live testing after updates of your apps is also important.
Using different versions of Database in restored (if backup is with other version) sometimes so… 
TIP:
For users and or Server admins, look in your own config files before reading (BIG) changelogs for updates, that saves time to know the things your are using. And after updating or installed newer versions then before check log files also extra.