Getting ERROR aftr trying to Ban user

Posted by Beautty on Jan 14, 2009; 3:43am
URL: https://support.nabble.com/Getting-ERROR-aftr-trying-to-Ban-user-tp2155033.html

This is the Error message im getting:

org.postgresql.util.PSQLException: ERROR: duplicate key value violates unique constraint "ban_pkey"

what does it mean? how this could be fixed and user Baned?