[Users] error adding a new subscriber

[rkmr.em at gmail.com]

Hi
I am adding a subscriber  and I get this error below:

 /usr/local/sbin/openserctl add 100 100 100 at localhost
database engine 'PGSQL' loaded
Control engine 'FIFO' loaded
is_user: user counter=0
check_db_alias: alias counter=
ERROR: user '100' already exists as alias


I am sure this user does not exist as I checked the table subscriber
and there is only one row with user 'admin'
Thanks
mark