Can I fix something to move forward with update, or should I go restoring backups?
Status.php outputs:
|installed|true|
|maintenance|false|
|needsDbUpgrade|true|
|version|“20.0.3.2”|
|versionstring|“20.0.3”|
|edition|""|
|productname|“Cė & I”|
|extendedSupport|false|
Nextcloud 19.0.6
Ubuntu 18.04
Apache2.4.29
PHP 7.3
FIXED by updating mariadb to the latest.
It was not so straight forward though: apt did not do it, I had to install aptitude and use that instead.