userdel -r jason
That didn't work either. I finally managd to create the user, so bookmark this post if needed.
Do the following:
rm -rf /var/spool/mail/jason
Edit the following files:
/etc/passwd (delete jason)
/etc/shadow (delete jason)
/etc/group (delete jason and delete jason from shared::

/etc/gshadow (delete jason and delete jason from shared::
