Mod_python error: "PythonHandler django.core.handlers.modpython"

Traceback (most recent call last):

  File "/usr/lib/python2.4/site-packages/mod_python/apache.py", line 299, in HandlerDispatch
    result = object(req)

  File "/usr/lib/python2.4/site-packages/django/core/handlers/modpython.py", line 188, in handler
    return ModPythonHandler()(req)

  File "/usr/lib/python2.4/site-packages/django/core/handlers/modpython.py", line 165, in __call__
    response = middleware_method(request, response)

  File "/usr/lib/python2.4/site-packages/django/contrib/sessions/middleware.py", line 37, in process_response
    request.session.save()

  File "/usr/lib/python2.4/site-packages/django/contrib/sessions/backends/db.py", line 42, in save
    expire_date = datetime.datetime.now() + datetime.timedelta(seconds=settings.SESSION_COOKIE_AGE)

  File "/usr/lib/python2.4/site-packages/django/db/models/manager.py", line 75, in create
    return self.get_query_set().create(**kwargs)

  File "/usr/lib/python2.4/site-packages/django/db/models/query.py", line 274, in create
    obj.save()

  File "/usr/lib/python2.4/site-packages/django/db/models/base.py", line 261, in save
    ','.join(placeholders)), db_values)

  File "/usr/lib/python2.4/site-packages/django/db/backends/sqlite3/base.py", line 133, in execute
    return Database.Cursor.execute(self, query, params)

OperationalError: database is locked