Error KeyError: ('talk.models', '', 'popularity_threshold')

What steps will reproduce the problem?
1. Created group/setting in module. Code below:

class NotiOptions(dbsettings.Group):
    noti_sender_name = dbsettings.StringValue('notification sender name.')
    noti_sender_email = dbsettings.StringValue('notification sender email.')
2. Runs dev server using python manage.py runserver .... command

What is the expected output? What do you see instead?
Program to run

What version of the product are you using? On what operating system?
Latest, current, downloaded from git

Please provide any additional information below.
Full error:

Validating models...
Unhandled exception in thread started by <function inner_run at 0xa4ec4fc>
Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.6/django/core/management/commands/runserver.py", line 48, in inner_run
    self.validate(display_num_errors=True)
  File "/usr/lib/pymodules/python2.6/django/core/management/base.py", line 249, in validate
    num_errors = get_validation_errors(s, app)
  File "/usr/lib/pymodules/python2.6/django/core/management/validation.py", line 28, in get_validation_errors
    for (app_name, error) in get_app_errors().items():
  File "/usr/lib/pymodules/python2.6/django/db/models/loading.py", line 146, in get_app_errors
    self._populate()
  File "/usr/lib/pymodules/python2.6/django/db/models/loading.py", line 61, in _populate
    self.load_app(app_name, True)
  File "/usr/lib/pymodules/python2.6/django/db/models/loading.py", line 78, in load_app
    models = import_module('.models', app_name)
  File "/usr/lib/pymodules/python2.6/django/utils/importlib.py", line 35, in import_module
    __import__(name)
  File "/home/python/python/django/publisy/talk/models.py", line 74, in <module>
    class Talk(models.Model):
  File "/home/python/python/django/publisy/talk/models.py", line 100, in Talk
    options = NotiOptions()
  File "/home/python/python/django/publisy/dbsettings/group.py", line 57, in __new__
    register_setting(attr)
  File "/home/python/python/django/publisy/dbsettings/loading.py", line 64, in register_setting
    _settings.insert(setting.key, bisect(list(_settings), setting), setting)
  File "/home/python/python/django/publisy/dbsettings/loading.py", line 17, in insert
    self[key] = value
  File "/usr/lib/pymodules/python2.6/django/utils/datastructures.py", line 113, in __setitem__
    if key not in self:
  File "/home/python/python/django/publisy/dbsettings/loading.py", line 24, in __contains__
    for v in self.values():
  File "/usr/lib/pymodules/python2.6/django/utils/datastructures.py", line 152, in values
    return map(self.__getitem__, self.keyOrder)
KeyError: ('talk.models', '', 'popularity_threshold')
Original issue reported on code.google.com by krishna....@gmail.com on 16 Sep 2011 at 6:19
google-code-export / django-values

Error KeyError: ('talk.models', '', 'popularity_threshold') #19
