Update mariadb from 10.0 to 10.3

[jonium]

Hello,
I'm going to update mariadb 10.0 to the next version available, the 10.3, and then proceed to the newest versions.
I'll backup all db.
My concern is: as the 10.0 is no more supported, if something go wrong how do I downgrade to that version?

Centos 7.9
DirecAdmin 1.655
Custombuild 2.0

 

[Active8]

My experience is even 10.4 branch support older programs, just backup and test it.
I advise you to upgrade your OS Centos 7 is soon end of life, you can do an inplace upgrade or better install an new server with Almalinux