How to set log_level in zigbee2mqtt in home assistant os?

zigbee2mqtt docs state that log level is adjusted by config entry

  log_level: warn

I have Pi with hassos and I’ve tried to go into addon config, edit as yaml and add that entry but it doesn’t seem to have any effect and supervisor logs show that

22-09-11 22:52:59 WARNING (MainThread) [supervisor.addons.options] Option 'advanced' does not exist in the schema for Zigbee2MQTT (45df7312_zigbee2mqtt)

So how do I set it?