Traceback (most recent call last):
  File "manage.py", line 34, in <module>
    import noc.urls
  File "/opt/noc/urls.py", line 25, in <module>
    CustomField.install_fields()
  File "/opt/noc/main/models/customfield.py", line 229, in install_fields
    mf = f.get_field()
  File "/opt/noc/main/models/customfield.py", line 120, in get_field
    raise NotImplementedError
NotImplementedError
upgrade-user: 42: sync-perm failed