cannot create new tickets

[dimitrios_koutsos@…]

(PostgreSQL) 8.2.4 python2.4 Trac: 0.10.4 plugins: scrumburndownplugin/ timingandestimationplugin/ webadmin/

error:

Traceback (most recent call last):
  File "/usr/local/lib/python2.4/site-packages/trac/web/main.py", line 406, in dispatch_request
    dispatcher.dispatch(req)
  File "/usr/local/lib/python2.4/site-packages/trac/web/main.py", line 237, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/local/lib/python2.4/site-packages/trac/ticket/web_ui.py", line 138, in process_request
    self._do_create(req, db)
  File "/usr/local/lib/python2.4/site-packages/trac/ticket/web_ui.py", line 201, in _do_create
    ticket.insert(db=db)
  File "/usr/local/lib/python2.4/site-packages/trac/ticket/model.py", line 180, in insert
    listener.ticket_created(self)
  File "build/bdist.solaris-2.10-i86pc/egg/burndown/burndown.py", line 124, in ticket_created
  File "build/bdist.solaris-2.10-i86pc/egg/burndown/burndown.py", line 330, in update_burndown_data
  File "/usr/local/lib/python2.4/site-packages/trac/db/util.py", line 51, in execute
    return self.cursor.execute(sql)
  File "/usr/local/lib/python2.4/site-packages/trac/db/util.py", line 51, in execute
    return self.cursor.execute(sql)
  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

[Emmanuel Blot]

This looks like an issue with the scrumburndownplugin. Please contact the plugin maintainer.