Can't get official "djangoproject.com" site running

Hello guys. I am quite a beginner in using django and python. I have
read through tutorial on the official website, and also separate
topics on models, views, templates, urls, forms. So I have basic idea
on how django works.
I have choosen the official djangoproject website from here
https://github.com/django/djangoproject.com as the subject for my
experiments. But I can't get it running.
I have installed all packages it needed. And, as I didn't want to
bother myself with PostgreSQL I changed engine to sqlite3.

Now I have error:
--------------------------------------------------------------------------------------------------
DoesNotExist at /

DocumentRelease matching query does not exist.

Environment:

Request Method: GET
Request URL: http://localhost:8000/

Django Version: 1.3
Python Version: 2.7.2
Installed Applications:
['django.contrib.sites',
'django.contrib.auth',
'django.contrib.admin',
'django.contrib.comments',
'django.contrib.contenttypes',
'django.contrib.flatpages',
'django.contrib.humanize',
'django.contrib.redirects',
'django.contrib.sessions',
'django.contrib.sitemaps',
'django_website.blog',
'django_website.aggregator',
'django_website.docs',
'registration',
'south']
Installed Middleware:
['django.contrib.sessions.middleware.SessionMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.middleware.common.CommonMiddleware',
'django.contrib.flatpages.middleware.FlatpageFallbackMiddleware',
'django.contrib.redirects.middleware.RedirectFallbackMiddleware']

Traceback:
File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in
get_response
111. response = callback(request,
*callback_args, **callback_kwargs)
File "C:\Python27\lib\site-packages\django\views\generic\simple.py" in
direct_to_template
26. c = RequestContext(request, dictionary)
File "C:\Python27\lib\site-packages\django\template\context.py" in
__init__
177. self.update(processor(request))
File "C:\Documents and Settings\user2\Desktop\!system\djangosite
\django_website\context_processors.py" in recent_release
9. recent_release =
DocumentRelease.objects.default().version
File "C:\Documents and Settings\user2\Desktop\!system\djangosite
\django_website\docs\models.py" in default
7. return DocumentRelease.objects.get(is_default=True)
File "C:\Python27\lib\site-packages\django\db\models\manager.py" in
get
132. return self.get_query_set().get(*args, **kwargs)
File "C:\Python27\lib\site-packages\django\db\models\query.py" in get
349. % self.model._meta.object_name)

Exception Type: DoesNotExist at /
Exception Value: DocumentRelease matching query does not exist.
----------------------------------------------------------------------------------------------------------------

Any help would be good, please.

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