Rails core - Jul 2006 - Error in Trac when submitting patch

I get the following error when trying to submit a patch:

Traceback (most recent call last):
 File "/usr/local/lib/python2.4/site-packages/trac/web/main.py", line
314, in dispatch_request
   dispatcher.dispatch(req)
 File "/usr/local/lib/python2.4/site-packages/trac/web/main.py", line
199, in dispatch
   resp = chosen_handler.process_request(req)
 File "/usr/local/lib/python2.4/site-packages/trac/ticket/web_ui.py",
line 109, in process_request
   self._do_create(req, db)
 File "/usr/local/lib/python2.4/site-packages/trac/ticket/web_ui.py",
line 170, in _do_create
   ticket.insert(db=db)
 File "/usr/local/lib/python2.4/site-packages/trac/ticket/model.py",
line 162, in insert
   [self[name] for name in std_fields] +
 File "/usr/local/lib/python2.4/site-packages/trac/db/util.py", line
47, in execute
   return self.cursor.execute(sql_escape_percent(sql), args)
 File "/usr/local/lib/python2.4/site-packages/trac/db/util.py", line
47, in execute
   return self.cursor.execute(sql_escape_percent(sql), args)
 File "/usr/local/lib/python2.4/site-packages/pyPgSQL/PgSQL.py", line
3111, in execute
   raise OperationalError, msg
OperationalError: ERROR:  null value in column "id" violates not-null
constraint

Thanks,
Shane Vitarana