I have made some fault in my config file, I have typed in did in groups and no matter what I do to remove the did in groups it do come back when I restart. and it is the same with user and password.
When im in z2m and try to remove groups, it reply this group do not exist
If you change in the zigbee2mqtt configuration.yaml, then you need to delete the backup file. If the 2 files are different it revert back. So, stop the add-on, change the configuration.yaml and delete the backup file (is in the same diretory). Then start the add-on again