./manage.py migration hang

stdout

Traceback (most recent call last):
  File "./manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/home/will/env/xSACdb-dj7/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
    utility.execute()
  File "/home/will/env/xSACdb-dj7/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 377, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/will/env/xSACdb-dj7/local/lib/python2.7/site-packages/django/core/management/base.py", line 288, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/home/will/env/xSACdb-dj7/local/lib/python2.7/site-packages/django/core/management/base.py", line 338, in execute
    output = self.handle(*args, **options)
  File "/home/will/env/xSACdb-dj7/local/lib/python2.7/site-packages/django/core/management/commands/makemigrations.py", line 89, in handle
    loader.project_state(),
  File "/home/will/env/xSACdb-dj7/local/lib/python2.7/site-packages/django/db/migrations/loader.py", line 268, in project_state
    return self.graph.make_state(nodes=nodes, at_end=at_end, real_apps=list(self.unmigrated_apps))
  File "/home/will/env/xSACdb-dj7/local/lib/python2.7/site-packages/django/db/migrations/graph.py", line 135, in make_state
    for migration in self.forwards_plan(node):
  File "/home/will/env/xSACdb-dj7/local/lib/python2.7/site-packages/django/db/migrations/graph.py", line 55, in forwards_plan
    return self.dfs(node, lambda x: self.dependencies.get(x, set()))
  File "/home/will/env/xSACdb-dj7/local/lib/python2.7/site-packages/django/db/migrations/graph.py", line 114, in dfs
    stack = children + stack
KeyboardInterrupt