Traceback (most recent call last):


 "/home/ubuntu/.virtualenvs/taiga/lib/python3.5/site-packages/django/core/handlers/exception.py", line 42, in inner

response = get_response(request)


 "/home/ubuntu/.virtualenvs/taiga/lib/python3.5/site-packages/django/core/handlers/base.py", line 249, in _legacy_get_response

response = self._get_response(request)


 "/home/ubuntu/.virtualenvs/taiga/lib/python3.5/site-packages/django/core/handlers/base.py", line 187, in _get_response

response = self.process_exception_by_middleware(e, request)


 "/home/ubuntu/.virtualenvs/taiga/lib/python3.5/site-packages/django/core/handlers/base.py", line 185, in _get_response

response = wrapped_callback(request, *callback_args, **callback_kwargs)


 "/home/ubuntu/taiga-back/taiga/base/api/viewsets.py", line 106, in view

return self.dispatch(request, *args, **kwargs)


 "/home/ubuntu/.virtualenvs/taiga/lib/python3.5/site-packages/django/views/decorators/csrf.py", line 58, in wrapped_view

return view_func(*args, **kwargs)


 "/home/ubuntu/taiga-back/taiga/base/api/views.py", line 461, in dispatch

response = self.handle_exception(exc)


 "/home/ubuntu/taiga-back/taiga/base/api/views.py", line 458, in dispatch

response = handler(request, *args, **kwargs)


 "/home/ubuntu/taiga-back/taiga/base/api/mixins.py", line 207, in partial_update

return self.update(request, *args, **kwargs)


 "/home/ubuntu/taiga-back/taiga/projects/tasks/api.py", line 203, in update

return super().update(request, *args, **kwargs)


 "/usr/lib/python3.5/contextlib.py", line 30, in inner

return func(*args, **kwds)


 "/home/ubuntu/.virtualenvs/taiga/lib/python3.5/site-packages/django/db/transaction.py", line 267, in __exit__

connection.set_autocommit(True)


 "/home/ubuntu/.virtualenvs/taiga/lib/python3.5/site-packages/django/db/backends/base/base.py", line 396, in set_autocommit

self.run_and_clear_commit_hooks()


 "/home/ubuntu/.virtualenvs/taiga/lib/python3.5/site-packages/django/db/backends/base/base.py", line 624, in run_and_clear_commit_hooks

func()


 "/home/ubuntu/taiga-back/taiga/webhooks/signal_handlers.py", line 75, in <lambda>

connection.on_commit(lambda: _execute_task(task, webhooks_args))


 "/home/ubuntu/taiga-back/taiga/webhooks/signal_handlers.py", line 84, in _execute_task

task(*webhook_args)


 "/home/ubuntu/.virtualenvs/taiga/lib/python3.5/site-packages/celery/local.py", line 191, in __call__

return self._get_current_object()(*a, **kw)


 "/home/ubuntu/.virtualenvs/taiga/lib/python3.5/site-packages/celery/app/task.py", line 379, in __call__

return self.run(*args, **kwargs)


 "/home/ubuntu/taiga-back/taiga/webhooks/tasks.py", line 142, in change_webhook

data['data'] = _serialize(obj)


 "/home/ubuntu/taiga-back/taiga/webhooks/tasks.py", line 47, in _serialize

return TaskSerializer(obj).data


 "/home/ubuntu/.virtualenvs/taiga/lib/python3.5/site-packages/serpy/serializer.py", line 134, in data

self._data = self.to_value(self.instance)


 "/home/ubuntu/.virtualenvs/taiga/lib/python3.5/site-packages/serpy/serializer.py", line 124, in to_value

return self._serialize(instance, fields)


 "/home/ubuntu/.virtualenvs/taiga/lib/python3.5/site-packages/serpy/serializer.py", line 114, in _serialize

result = to_value(result)


 "/home/ubuntu/.virtualenvs/taiga/lib/python3.5/site-packages/serpy/serializer.py", line 124, in to_value

return self._serialize(instance, fields)


 "/home/ubuntu/.virtualenvs/taiga/lib/python3.5/site-packages/serpy/serializer.py", line 107, in _serialize

result = getter(self, instance)


 "/home/ubuntu/taiga-back/taiga/webhooks/serializers.py", line 165, in get_custom_attributes_values

values = obj.custom_attributes_values.attributes_values
AttributeError: 'NoneType' object has no attribute 'custom_attributes_values'

Traceback (most recent call last):


 "/usr/share/dupeguru/qt/results_model.py", line 93, in appWillSavePrefs

self.model.columns.save_columns()
AttributeError: 'NoneType' object has no attribute 'model'
