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Original usage:
• The name of a newly added user cannot repeat that of an existing user.
The name of a new user must be unique.
Reason :It is redundant when written as newly added user.
Your phraseology looks fine to me. I agree that "newly added" is redundant, but keep in mind that quite often written instructions or directions are purposely redundant in order to be as explicit as possible.
is this okay- any valid suggestions? 
Re: is this okay- any valid suggestions? 
Linear Mode
