Log Message:
2.0.10:
- Bugfix: Handling case of `None` user in request (@pawelad).
- Documentation corrections (@danielquinn).
- Bugfix: "invalid literal for int() with base 10: 'None'" for \ 
unversioned admin inline relations.

  If, after updating, you still experience this issue, run the following in a \ 
Django shell:

  .. code::

      from reversion.models import Version
      Version.objects.filter(object_id="None").delete()

  **Important:** Ensure that none of your versioned models contain a string \ 
primary key where `"None"` is a valid value
  before running this snippet!