title: NodeNotFoundError in Django
body: <p>Every time I try to run the server or migrate I get this error in the command line:</p>
  
  <pre><code>django.db.migrations.exceptions.NodeNotFoundError: Migration  auth.0009_user_following dependencies reference nonexistent parent node (u'account', u'0002_contact')
  </code></pre>
  
  <p>I did make a following system but i can't find were it is. I also tried deleting my some of my django projects but I still get this error. Please help me.</p>