Re: FTG 6.0.4 "Failed to save administrator: Permission denied."
how about more info, or config snippets or reproduction scenario ?
It seems unclear to most of us what you are trying to do.
As if you are logged in through wildcard admin, then modifying that wildcard config might not be the best idea.
Also, you might use VDOMs and see admins from global scope while logged in VDOM scope you might not be allowed to modify global scope admin. There might be variables in your setup not obviously linked but affecting situation.