Zigbee2mqtt hass.io debug log

Hello, how can i set debug level error in zigbee2mqtt hassio addon?
I tried to add it under advanced section but all is red and i can’t save, I’ve tried to ad it in configuration.yaml inside advance section but when reload addon or restart HA the value disappear. Any help?

Would be easier to help if you post the config you added in the addon ! Maybe you have some syntax error that why it’s “all red and can’t be saved”

Just tried and :

[more on top]
"advanced": {
    "log_level": "debug", 
[more to follow]

works fine for me !