Traceback (most recent call last):
  File "/usr/local/lib/python3.9/site-packages/kombu/serialization.py", line 41, in _reraise_errors
    yield
  File "/usr/local/lib/python3.9/site-packages/kombu/serialization.py", line 220, in dumps
    payload = encoder(data)
  File "/usr/local/lib/python3.9/site-packages/kombu/utils/json.py", line 63, in dumps
    return _dumps(s, cls=cls, **dict(default_kwargs, **kwargs))
  File "/usr/local/lib/python3.9/json/__init__.py", line 234, in dumps
    return cls(
  File "/usr/local/lib/python3.9/json/encoder.py", line 199, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/usr/local/lib/python3.9/json/encoder.py", line 257, in iterencode
    return _iterencode(o, 0)
  File "/usr/local/lib/python3.9/site-packages/kombu/utils/json.py", line 47, in default
    return super().default(o)
  File "/usr/local/lib/python3.9/json/encoder.py", line 179, in default
    raise TypeError(f'Object of type {o.__class__.__name__} '
TypeError: Object of type set is not JSON serializable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.9/site-packages/celery/app/trace.py", line 520, in trace_task
    task.backend.mark_as_done(
  File "/usr/local/lib/python3.9/site-packages/celery/backends/base.py", line 157, in mark_as_done
    self.store_result(task_id, result, state, request=request)
  File "/usr/local/lib/python3.9/site-packages/celery/backends/base.py", line 526, in store_result
    self._store_result(task_id, result, state, traceback,
  File "/usr/local/lib/python3.9/site-packages/celery/backends/base.py", line 979, in _store_result
    self._set_with_state(self.get_key_for_task(task_id), self.encode(meta), state)
  File "/usr/local/lib/python3.9/site-packages/celery/backends/base.py", line 413, in encode
    _, _, payload = self._encode(data)
  File "/usr/local/lib/python3.9/site-packages/celery/backends/base.py", line 417, in _encode
    return dumps(data, serializer=self.serializer)
  File "/usr/local/lib/python3.9/site-packages/kombu/serialization.py", line 220, in dumps
    payload = encoder(data)
  File "/usr/local/lib/python3.9/contextlib.py", line 137, in __exit__
    self.gen.throw(typ, value, traceback)
  File "/usr/local/lib/python3.9/site-packages/kombu/serialization.py", line 45, in _reraise_errors
    reraise(wrapper, wrapper(exc), sys.exc_info()[2])
  File "/usr/local/lib/python3.9/site-packages/kombu/exceptions.py", line 34, in reraise
    raise value.with_traceback(tb)
  File "/usr/local/lib/python3.9/site-packages/kombu/serialization.py", line 41, in _reraise_errors
    yield
  File "/usr/local/lib/python3.9/site-packages/kombu/serialization.py", line 220, in dumps
    payload = encoder(data)
  File "/usr/local/lib/python3.9/site-packages/kombu/utils/json.py", line 63, in dumps
    return _dumps(s, cls=cls, **dict(default_kwargs, **kwargs))
  File "/usr/local/lib/python3.9/json/__init__.py", line 234, in dumps
    return cls(
  File "/usr/local/lib/python3.9/json/encoder.py", line 199, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/usr/local/lib/python3.9/json/encoder.py", line 257, in iterencode
    return _iterencode(o, 0)
  File "/usr/local/lib/python3.9/site-packages/kombu/utils/json.py", line 47, in default
    return super().default(o)
  File "/usr/local/lib/python3.9/json/encoder.py", line 179, in default
    raise TypeError(f'Object of type {o.__class__.__name__} '
kombu.exceptions.EncodeError: Object of type set is not JSON serializable