session-error-appengine_utilities

autofollowr & gaeutilities
INFO     2013-10-21 20:03:26,632 server.py:593] default: "GET / HTTP/1.1" 500 -
ERROR    2013-10-22 03:05:08,696 cgi.py:121] Traceback (most recent call last):

  File "P:\New folder\joerussbowman-gaeutilities-ea3f7e1\main.py", line 18, in <module>

    from appengine_utilities import sessions

  File "P:\New folder\joerussbowman-gaeutilities-ea3f7e1\appengine_utilities\sessions.py", line 247, in <module>

    class _AppEngineUtilities_SessionData(db.Model):

  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\db\__init__.py", line 515, in __init__

    _initialize_properties(cls, name, bases, dct)

  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\db\__init__.py", line 430, in _initialize_properties

    attr.__property_config__(model_class, attr_name)

  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\db\__init__.py", line 3686, in __property_config__

    self.collection_name))

DuplicatePropertyError: Class _AppEngineUtilities_Session already has property _appengineutilities_sessiondata_set