I can, give example.
Account had disabled few services: Create units, Create resources, Units, etc. Lets call this account as CLIENT_AC
User of this account had disabled option "Can create items". Lets call this user as CLIENT
We do it to totally block possibility to see units tab, and creating new units by CLIENT. (We know biling restrictions)
We were loged in as "super admin" to CMC. "Super admin" can do everything we thought.
We tried to create new unit on CLIENT_AC by selecting CLIENT user as creator.
We couldn't do that, and got unclear error message. It was strange that "Super admin" can't do that, bypassing CLIENT_AC and CLIENT restrictions.
So we configured CLENT settings and enabled option "Can create items".
We tried to create device again and we had this same situation.
We repeated few steps again by enabling the disabled services, and done.
Device was created. There wasn't any clear information about reason why we get errors messages.
At the end we disable again services and "Can create items" option.
So this is one example how error messages are not clear. If I remember the message, it was something of existance of unit with the same properties.
At this point also I'm asking why as "super admin" I can't do things which are restricted for users. Why "super admin" can't bypass user restrictions?