Let me quote from the illustrious Charlie Brady, who said, and I quote
"That indicates a problem when you deleted that user - it left a line in
/home/e-smith/accounts which looks like:
username=user-deleted|First|John|Last|Citizen|....
Remove that line from that file and you can then re-add that user.
Or you could take a short cut and change "user-deleted" to "user", then do:
/sbin/e-smith/signal-event user-create username "
End of quote. Ha!