Tried change_stage in module django.contrib.admin.views.main. Error was: 'module' object has no attribute 'change_stage'

Another Django upgrade hint:

Tried change_stage in module django.contrib.admin.views.main. Error was: 'module' object has no attribute 'change_stage'

Your forgot to update urls.conf as follows:

# OLD:
from django.conf.urls.defaults import *

urlpatterns = patterns('',
(r'^admin/', include('django.contrib.admin.urls')),
)

# NEW:
from django.conf.urls.defaults import *
from django.contrib import admin

admin.autodiscover()

urlpatterns = patterns('',
(r'^admin/(.*)', admin.site.root),
)