Swimbot Error

Traceback (most recent call last):
  File "/home/pi/.local/lib/python3.9/site-packages/discord/ext/commands/core.py", line 85, in wrapped
    ret = await coro(*args, **kwargs)
  File "/home/pi/Swimbot/waitlist.py", line 181, in wait
    self.bot.waitlist.insert({'discord_id':target.id,'tags':[tag], 'names':[name], 'levels': [th_lvl], 'status':[1],'time':[arrow.utcnow().timestamp],'comments':[comments]})
  File "/home/pi/.local/lib/python3.9/site-packages/tinydb/table.py", line 173, in insert
    self._update_table(updater)
  File "/home/pi/.local/lib/python3.9/site-packages/tinydb/table.py", line 747, in _update_table
    self._storage.write(tables)
  File "/home/pi/.local/lib/python3.9/site-packages/tinydb/storages.py", line 132, in write
    serialized = json.dumps(data, **self.kwargs)
  File "/usr/lib/python3.9/json/__init__.py", line 231, in dumps
    return _default_encoder.encode(obj)
  File "/usr/lib/python3.9/json/encoder.py", line 199, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/usr/lib/python3.9/json/encoder.py", line 257, in iterencode
    return _iterencode(o, 0)
  File "/usr/lib/python3.9/json/encoder.py", line 179, in default
    raise TypeError(f'Object of type {o.__class__.__name__} '
TypeError: Object of type method is not JSON serializable