InvalidBasesError when running migrate in Django - django

Question

I'm trying to discover django-cms.
I've made a fresh project (following these steps). But when I do a django migrate, I get the following issue:
>>>python manage.py migrate
Operations to perform:
Synchronize unmigrated apps: treebeard, menus, sekizai, cms, djangocms_admin_style
Apply all migrations: sessions, reversion, auth, admin, contenttypes, sites, djangocms_picture
Synchronizing apps without migrations:
Creating tables...
Installing custom SQL...
Installing indexes...
Running migrations:
Applying djangocms_picture.0001_initial...Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/home/vmonteco/.Envs/django-cms/lib/python3.4/site-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
utility.execute()
File "/home/vmonteco/.Envs/django-cms/lib/python3.4/site-packages/django/core/management/__init__.py", line 377, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/vmonteco/.Envs/django-cms/lib/python3.4/site-packages/django/core/management/base.py", line 288, in run_from_argv
self.execute(*args, **options.__dict__)
File "/home/vmonteco/.Envs/django-cms/lib/python3.4/site-packages/django/core/management/base.py", line 338, in execute
output = self.handle(*args, **options)
File "/home/vmonteco/.Envs/django-cms/lib/python3.4/site-packages/django/core/management/commands/migrate.py", line 161, in handle
executor.migrate(targets, plan, fake=options.get("fake", False))
File "/home/vmonteco/.Envs/django-cms/lib/python3.4/site-packages/django/db/migrations/executor.py", line 68, in migrate
self.apply_migration(migration, fake=fake)
File "/home/vmonteco/.Envs/django-cms/lib/python3.4/site-packages/django/db/migrations/executor.py", line 96, in apply_migration
if self.detect_soft_applied(migration):
File "/home/vmonteco/.Envs/django-cms/lib/python3.4/site-packages/django/db/migrations/executor.py", line 140, in detect_soft_applied
apps = project_state.render()
File "/home/vmonteco/.Envs/django-cms/lib/python3.4/site-packages/django/db/migrations/state.py", line 75, in render
"for more" % new_unrendered_models
django.db.migrations.state.InvalidBasesError: Cannot resolve bases for [<ModelState: 'cms.PageUser'>, <ModelState: 'cms.PageUserGroup'>]
This can happen if you are inheriting models from an app with migrations (e.g. contrib.auth)
in an app with no migrations; see https://docs.djangoproject.com/en/1.7/topics/migrations/#dependencies for more
Here is my INSTALLED_APPS :
INSTALLED_APPS = (
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'django.contrib.auth',
'django.contrib.sites',
'djangocms_admin_style', # for the admin skin. must be before 'django.contrib.admin'
'django.contrib.admin',
'cms', # django CMS itself
'treebeard', # utilities for implementing a tree (replaces mptt)
'menus', # helper for model independent herarchical website navigation
'sekizai', # for JS and CSS management.
'reversion', # to versionize content
#'djangocms_file',
#'djangocms_picture',
#'djangocms_video',
#'djangocms_link',
#'djangocms_text_ckeditor', # django text plugin
)
This error occurs when I uncomment one of the last lines. Why?
How could I fix this?

Answer 1

I found the solution here.
You have to change MIGRATION_MODULES in your project settings, removing _django from some of the values. The linked page mentions cms and menus, but I had to remove it from djangocms_link and djangocms_text_ckeditor too.