model conflict error

gistfile1.txt

Traceback (most recent call last):
  File "/usr/lib/python2.7/wsgiref/handlers.py", line 85, in run
    self.result = application(self.environ, self.start_response)
  File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/django/contrib/staticfiles/handlers.py", line 63, in __call__
    return self.application(environ, start_response)
  File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/django/core/handlers/wsgi.py", line 170, in __call__
    self.load_middleware()
  File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 52, in load_middleware
    mw_instance = mw_class()
  File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/django/middleware/locale.py", line 24, in __init__
    for url_pattern in get_resolver(None).url_patterns:
  File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/django/core/urlresolvers.py", line 401, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/django/core/urlresolvers.py", line 395, in urlconf_module
    self._urlconf_module = import_module(self.urlconf_name)
  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/edx/app/edxapp/edx-platform/lms/urls.py", line 737, in <module>
    url(r'^api/ccx/', include('ccx.api.urls', namespace='ccx_api')),
  File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/django/conf/urls/__init__.py", line 33, in include
    urlconf_module = import_module(urlconf_module)
  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/edx/app/edxapp/edx-platform/lms/djangoapps/ccx/api/urls.py", line 6, in <module>
    url(r'^v0/', include('ccx.api.v0.urls', namespace='v0')),
  File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/django/conf/urls/__init__.py", line 33, in include
    urlconf_module = import_module(urlconf_module)
  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/edx/app/edxapp/edx-platform/lms/djangoapps/ccx/api/v0/urls.py", line 6, in <module>
    from ccx.api.v0 import views
  File "/edx/app/edxapp/edx-platform/lms/djangoapps/ccx/api/v0/views.py", line 19, in <module>
    from ccx.models import CustomCourseForEdX
  File "/edx/app/edxapp/edx-platform/lms/djangoapps/ccx/models.py", line 20, in <module>
    class CustomCourseForEdX(models.Model):
  File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/django/db/models/base.py", line 309, in __new__
    new_class._meta.apps.register_model(new_class._meta.app_label, new_class)
  File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/django/apps/registry.py", line 221, in register_model
    (model_name, app_label, app_models[model_name], model))
RuntimeError: Conflicting 'customcourseforedx' models in application 'ccx': <class 'lms.djangoapps.ccx.models.CustomCourseForEdX'> and <class 'ccx.models.CustomCourseForEdX'>.
[23/Nov/2015 08:37:39] "GET /dashboard HTTP/1.1" 500 59