Allow Admins to only copy, but not modify a certain group.

We have different standart groups on our server.

Due to the amount of admins, I'd like the standart groups protected.

So I had the idea of individualized groups for people, which admins can create.

For supporters to be able give these groups to people, I specifically created a group with the correct needed add/remove power for admins to copy.

So far, this works by setting i_group_needed_modify_power of all standart groups to 70 and giving Server-Admin "group i_group_modify_power" to 40, which is the "i_group_needed_modify_power" of the copyable group.


Admins cant change or copy any standart group values and get the error "insufficient client permissions ( i_group_modify_power)", which is as expected.

But now, whenever Admins try to set an icon onto the copyable group, I get the error "insufficient permission modify power"

So I'd like for Admins to be able to set an icon, but not being able to change any other permission value.
How do I do this?

Allow Admins to only copy, but not modify a certain group.