Hi Keith,
It's possible you may have misunderstood the original question, which was about duplicate Profile Manager accounts for the same PM.
Some people join Wikitree as a Guest Member or a Family Member, then forget their log-in details or lose interest and go away for some time and may forget that they already have an account. Or maybe can't work out how to convert their account to full membership. Or maybe there is a glitch in the system that sometimes keeps the old accounts. Could be any of these things.
Anyway, these people have two accounts with identical Profile Manager names - and one of these accounts needs to be deactivated (Wikitree policy - one member, one account).
Because these profiles are "active" they cannot be resolved by the usual method of proposing a merge. Duplicate profiles in another profile manager's account, and duplicate profiles managed by you can be resolved through the Merge process.