我正在浏览http://django-blog-zinnia.com/documentation/getting-started/install/的文档
当我同步数据库时，我收到此错误，标记在我安装的应用程序中，有人可以帮助我吗？
Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/home/brian/virt_env/virt_step/local/lib/python2.7/site-packages/Django-1.4.2-py2.7.egg/django/core/management/__init__.py", line 443, in execute_from_command_line
utility.execute()
File "/home/brian/virt_env/virt_step/local/lib/python2.7/site-packages/Django-1.4.2-py2.7.egg/django/core/management/__init__.py", line 382, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/brian/virt_env/virt_step/local/lib/python2.7/site-packages/Django-1.4.2-py2.7.egg/django/core/management/base.py", line 196, in run_from_argv
self.execute(*args, **options.__dict__)
File "/home/brian/virt_env/virt_step/local/lib/python2.7/site-packages/Django-1.4.2-py2.7.egg/django/core/management/base.py", line 231, in execute
self.validate()
File "/home/brian/virt_env/virt_step/local/lib/python2.7/site-packages/Django-1.4.2-py2.7.egg/django/core/management/base.py", line 266, in validate
num_errors = get_validation_errors(s, app)
File "/home/brian/virt_env/virt_step/local/lib/python2.7/site-packages/Django-1.4.2-py2.7.egg/django/core/management/validation.py", line 30, in get_validation_errors
for (app_name, error) in get_app_errors().items():
File "/home/brian/virt_env/virt_step/local/lib/python2.7/site-packages/Django-1.4.2-py2.7.egg/django/db/models/loading.py", line 158, in get_app_errors
self._populate()
File "/home/brian/virt_env/virt_step/local/lib/python2.7/site-packages/Django-1.4.2-py2.7.egg/django/db/models/loading.py", line 67, in _populate
self.load_app(app_name)
File "/home/brian/virt_env/virt_step/local/lib/python2.7/site-packages/Django-1.4.2-py2.7.egg/django/db/models/loading.py", line 88, in load_app
models = import_module('.models', app_name)
File "/home/brian/virt_env/virt_step/local/lib/python2.7/site-packages/Django-1.4.2-py2.7.egg/django/utils/importlib.py", line 35, in import_module
__import__(name)
File "/home/brian/virt_env/virt_step/local/lib/python2.7/site-packages/django_blog_zinnia-0.12.dev-py2.7.egg/zinnia/models/__init__.py", line 5, in <module>
from zinnia.models.entry import Entry
File "/home/brian/virt_env/virt_step/local/lib/python2.7/site-packages/django_blog_zinnia-0.12.dev-py2.7.egg/zinnia/models/entry.py", line 22, in <module>
from tagging.fields import TagField
File "/home/brian/virt_env/virt_step/local/lib/python2.7/site-packages/tagging-0.2.1-py2.7.egg/tagging/fields.py", line 10, in <module>
from tagging.models import Tag
File "/home/brian/virt_env/virt_step/local/lib/python2.7/site-packages/tagging-0.2.1-py2.7.egg/tagging/models.py", line 9, in <module>
from tagging.managers import TagManager, TaggedItemManager
File "/home/brian/virt_env/virt_step/local/lib/python2.7/site-packages/tagging-0.2.1-py2.7.egg/tagging/managers.py", line 6, in <module>
from django.db.models.query import QuerySet, parse_lookup
ImportError: cannot import name parse_lookup