Wiping 'as77-1':
    Deleting new events ... done
    Deleting failed events ... done
    Deleting active events ... done
    Deleting archived events ... done
    Deleting alarms ... done
    Deleting interfaces, subinterfaces and links ... done
    Unbinding from IPAM ... done
    Deleting object's attributes ... done
    Deleting managed object and config ... Traceback (most recent call last):
  File "manage.py", line 41, in <module>
    execute_manager(settings)
  File "/opt/noc/contrib/lib/django/core/management/__init__.py", line 438, in execute_manager
    utility.execute()
  File "/opt/noc/contrib/lib/django/core/management/__init__.py", line 379, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/opt/noc/contrib/lib/django/core/management/base.py", line 191, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/opt/noc/contrib/lib/django/core/management/base.py", line 220, in execute
    output = self.handle(*args, **options)
  File "/opt/noc/main/management/commands/wipe.py", line 45, in handle
    wiper(o)
  File "/opt/noc/main/management/commands/wipe.py", line 146, in wipe_managed_object
    o.delete()
  File "/opt/noc/sa/models.py", line 352, in delete
    super(ManagedObject, self).delete()
  File "/opt/noc/contrib/lib/django/db/models/base.py", line 581, in delete
    collector.delete()
  File "/opt/noc/contrib/lib/django/db/models/deletion.py", line 63, in decorated
    func(self, *args, **kwargs)
  File "/opt/noc/contrib/lib/django/db/models/deletion.py", line 230, in delete
    sender=model, instance=obj, using=self.using
  File "/opt/noc/contrib/lib/django/dispatch/dispatcher.py", line 172, in send
    response = receiver(signal=self, sender=sender, **named)
  File "/opt/noc/lib/nosql.py", line 143, in on_ref_delete
    doc))
django.db.utils.IntegrityError: <ManagedObject: as77-1> object is referenced from <class 'noc.inv.models.DiscoveryStatusInterface'>