Firstly i would like to say hello to everyone because i'm new here

But let's get started into my problem.

I'm one of server admins and i would like to add some permissions to our group (especially i_client_whisper_power) but i simply can't do it because of famous error "insufficient permission modify power". i_permission_modify_power (and if important i_group_modify_power) value is set to 75 as well as Grant and i can't change them too. We also have not added i_group_needed_modify_power but it's Grant value is set to 75. I already read some topics/posts about it, but i'm trying to avoid reseting permissions system. Is there any other way to fix it?