Traceback (most recent call last):

  File "/srv/ris/venv/lib/python2.7/site-packages/django/core/handlers/base.py", line 114, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)

  File "/srv/ris/venv/lib/python2.7/site-packages/django/views/generic/base.py", line 69, in view
    return self.dispatch(request, *args, **kwargs)

  File "/srv/ris/venv/lib/python2.7/site-packages/django/utils/decorators.py", line 29, in _wrapper
    return bound_func(*args, **kwargs)

  File "/srv/ris/venv/lib/python2.7/site-packages/django/contrib/admin/views/decorators.py", line 17, in _checklogin
    return view_func(request, *args, **kwargs)

  File "/srv/ris/venv/lib/python2.7/site-packages/django/utils/decorators.py", line 25, in bound_func
    return func(self, *args2, **kwargs2)

  File "/srv/ris/code/ris/admin/mixins.py", line 7, in dispatch
    return super(SuperUserRequiredMixin, self).dispatch(request, *args, **kwargs)

  File "/srv/ris/venv/lib/python2.7/site-packages/django/views/generic/base.py", line 87, in dispatch
    return handler(request, *args, **kwargs)

  File "/srv/ris/venv/lib/python2.7/site-packages/django/views/generic/edit.py", line 257, in post
    return self.delete(request, *args, **kwargs)

  File "/srv/ris/venv/lib/python2.7/site-packages/django/views/generic/edit.py", line 252, in delete
    self.object.delete()

  File "/srv/ris/venv/lib/python2.7/site-packages/django/db/models/base.py", line 695, in delete
    collector.delete()

  File "/srv/ris/venv/lib/python2.7/site-packages/django/db/models/deletion.py", line 282, in delete
    sender=model, instance=obj, using=self.using

  File "/srv/ris/venv/lib/python2.7/site-packages/django/db/transaction.py", line 305, in __exit__
    connection.commit()

  File "/srv/ris/venv/lib/python2.7/site-packages/django/db/backends/__init__.py", line 168, in commit
    self._commit()

  File "/srv/ris/venv/lib/python2.7/site-packages/django/db/backends/__init__.py", line 136, in _commit
    return self.connection.commit()

  File "/srv/ris/venv/lib/python2.7/site-packages/django/db/utils.py", line 99, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)

  File "/srv/ris/venv/lib/python2.7/site-packages/django/db/backends/__init__.py", line 136, in _commit
    return self.connection.commit()

IntegrityError: update or delete on table "database_description" violates foreign key constraint "description_id_refs_resource_ptr_id_9f02361b" on table "database_descriptionpdf"
SZCZEGÓŁY:  Key (resource_ptr_id)=(622) is still referenced from table "database_descriptionpdf".