Comments - MariaDB 10.1.41 won't start
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Per your SO question, this appears to be a (old) proxmox issue.
Other old, now fixed, proxmox issues include MDEV-23050.
Also note 10.1 is out of maintenance for a while now (probably like your proxmox and debian version)
Thanks Daniel for te answer. Reading the forums I found the solution.
Basically the solution is ... "Solved it by deleting/renaming the tc.log mv -vi /var/lib/mysql/tc.log /root And restarting the database service mysql restart" And mariaddb start again.