Hello, not strictly related to Kamailio, but I know a large number of its deployments run with MariaDB. Be aware of a (pretty high) risk of failure after upgrading MariaDB server to v10.3.31, which comes now on Debian 10 via the usual apt update+upgrade. I was hit on one the servers I upgraded recently, first one worked fine, the 2nd failed to start MariaDB service after upgrade - there is a bug report about it:   * https://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1823336.h… Downgrading MariaDB seems to be the right solution for now, specially if you didn't do a backup just before upgrade. Don't try other tricks without a fresh backup, data files can be damaged. If you have a fresh backup, there seems to be a solution by deleting database files to start with a clean set and then restore from backup with sql statements. FreeBSD has a similar bug report, so doesn't seem to be only Debian, could be other Linux distros as well. Even with fresh backups, plan for a longer maintenance time frame than usual. Cheers, Daniel -- Daniel-Constantin Mierla -- www.asipto.com www.twitter.com/miconda -- www.linkedin.com/in/miconda Kamailio Advanced Training - Online Nov 08-11, 2021 (Europe Timezone) - Nov 22-25, 2021 (America Timezone) * https://www.asipto.com/sw/kamailio-advanced-training-online/