Unsupported DB! MariaDB version is 50505 which is smaller than minimum of 100037

[fl0w]

Hi,

After updating my Zabbix server from v4 to v5.4.3, I get the following error when starting zabbix-server (all is running with Docker):

 7:20210826:203358.268 Starting Zabbix Server. Zabbix 5.4.0 (revision 5059e20).
7:20210826:203358.268 ****** Enabled features ******
7:20210826:203358.268 SNMP monitoring: YES
7:20210826:203358.268 IPMI monitoring: YES
7:20210826:203358.268 Web monitoring: YES
7:20210826:203358.268 VMware monitoring: YES
7:20210826:203358.268 SMTP authentication: YES
7:20210826:203358.268 ODBC: YES
7:20210826:203358.268 SSH support: YES
7:20210826:203358.268 IPv6 support: YES
7:20210826:203358.268 TLS support: YES
7:20210826:203358.268 ******************************
7:20210826:203358.268 using configuration file: /etc/zabbix/zabbix_server.conf
[B]7:20210826:203358.274 Unsupported DB! MariaDB version is 50505 which is smaller than minimum of 100037[/B]
7:20210826:203358.275 current database version (mandatory/optional): 05040000/05040000
7:20210826:203358.275 required mandatory version: 05040000
7:20210826:203358.277 Zabbix supports only "utf8" character set. Database "zabbix" has default character set "utf8mb3"
7:20210826:203358.277 Zabbix supports only "utf8_bin" collation. Database "zabbix" has default collation "utf8mb3_general_ci"
7:20210826:203358.282 character set name or collation name that is not supported by Zabbix found in 458 column(s) of database "zabbix"
7:20210826:203358.282 only character set "utf8" and collation "utf8_bin" should be used in database

I followed the instructions here but it didn't help. It seems the reported MariaDB version is in fact a MySQL version (which was running beforce I upgraded to Zabbix v5). I started a new container for the database server and imported a dump of the database, so the installation should be clean.
If I check the MariaDB version it seems okay:

MariaDB [(none)]> SELECT VERSION();
+-------------------------------------+
| VERSION() |
+-------------------------------------+
| 10.6.4-MariaDB-1:10.6.4+maria~focal |
+-------------------------------------+

Any idea what could be wrong?
Thanks!

[fl0w]

No idea?