Error - 'User Name has already been used by an existing user record' on editing a user record

A Financials user that has been deactivated in Access Evo will not show in the system and so in the first instance please check that there are no users of this status that may be causing the problem.
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If there are no other users in Access Evo of that name, and you would like an update on the progress of this development issue: Please raise a new case online and reference the title of this article