[Mashiro]

MariaDB is MySQL. It is a alternative free MySQL database server by a different development entity (MariaDB Foundation). The actual MySQL is owned by Oracle since a few years and Oracle always changes license NOT in favor of the free users because they want people to pay / change to a paid product. So the default shipping MySQL server was changed in Linux distributions to MariaDB.

Debian 9 is out of support since last year but it's in long term support for atleast another year (til 2022-06). Just as a side note.

Send me a private message if you want to give me access to fix this.