Hi there,

I have just tried to update my Zabbix Proxy which is running in docker on Ubuntu. I am using the image zabbix/zabbix-proxy-mysql:alpine-7.0-latest and I have ZBX_ALLOWUNSUPPORTEDDBVERSIONS=1 configured under environment. This used to work before however this environment variable no longer seems to be working. The configuration option isn't getting passed to zabbix_proxy.conf within the container and the container no longer starts with this error due to my db image being updates to 9.7.0:

1:20260513:093258.177 Unable to start Zabbix proxy due to unsupported MySQL database version (9.07.00).
     1:20260513:093258.177 Must not be higher than (9.06.x).

I have a couple other proxies setup the same which I haven't updated yet. These also don't have AllowUnsupportedDBVersions=1 in the conf file. This was created 22nd April 2026 so whenever this stopped working it was prior to this date.

The env still seems to be working for the zabbix/zabbix-server-mysql:alpine-7.0-latest image.