domain settings

Hey experts, am getting this error idk why because in ACL domain i can see my domain IP is already added idk what it is can someone please tell what it could be ?? Any help would be appreciated

Hello, I have 4 domains in one FusionPBX I see under Advanced --> Variables Default variables for every domain in same FusionPBX but I want per domain different Defaults for next variables default_language default_dialect default_voice global_codec_prefs timezone sound_prefix hold_music...