Traceback (most recent call last):
  File "/tmp/.mount_electrvOLK31/usr/lib/python3.9/site-packages/electrum/gui/qt/main_window.py", line 3216, in closeEvent
    self.clean_up()
  File "/tmp/.mount_electrvOLK31/usr/lib/python3.9/site-packages/electrum/gui/qt/main_window.py", line 3243, in clean_up
    self.gui_object.close_window(self)
  File "/tmp/.mount_electrvOLK31/usr/lib/python3.9/site-packages/electrum/gui/qt/__init__.py", line 424, in close_window
    self.daemon.stop_wallet(window.wallet.storage.path)
  File "/tmp/.mount_electrvOLK31/usr/lib/python3.9/site-packages/electrum/daemon.py", line 574, in stop_wallet
    return fut.result()
  File "/tmp/.mount_electrvOLK31/usr/lib/python3.9/concurrent/futures/_base.py", line 446, in result
    return self.__get_result()
  File "/tmp/.mount_electrvOLK31/usr/lib/python3.9/concurrent/futures/_base.py", line 391, in __get_result
    raise self._exception
  File "/tmp/.mount_electrvOLK31/usr/lib/python3.9/site-packages/electrum/daemon.py", line 582, in _stop_wallet
    await wallet.stop()
  File "/tmp/.mount_electrvOLK31/usr/lib/python3.9/site-packages/electrum/wallet.py", line 380, in stop
    self.save_db()
  File "/tmp/.mount_electrvOLK31/usr/lib/python3.9/site-packages/electrum/wallet.py", line 315, in save_db
    self.db.write(self.storage)
  File "/tmp/.mount_electrvOLK31/usr/lib/python3.9/site-packages/electrum/wallet_db.py", line 1408, in write
    self._write(storage)
  File "/tmp/.mount_electrvOLK31/usr/lib/python3.9/site-packages/electrum/util.py", line 439, in <lambda>
    return lambda *args, **kw_args: do_profile(args, kw_args)
  File "/tmp/.mount_electrvOLK31/usr/lib/python3.9/site-packages/electrum/util.py", line 435, in do_profile
    o = func(*args, **kw_args)
  File "/tmp/.mount_electrvOLK31/usr/lib/python3.9/site-packages/electrum/wallet_db.py", line 1417, in _write
    json_str = self.dump(human_readable=not storage.is_encrypted())
  File "/tmp/.mount_electrvOLK31/usr/lib/python3.9/site-packages/electrum/json_db.py", line 44, in wrapper
    return func(self, *args, **kwargs)
  File "/tmp/.mount_electrvOLK31/usr/lib/python3.9/site-packages/electrum/json_db.py", line 175, in dump
    return json.dumps(
  File "/tmp/.mount_electrvOLK31/usr/lib/python3.9/json/__init__.py", line 234, in dumps
    return cls(
  File "/tmp/.mount_electrvOLK31/usr/lib/python3.9/json/encoder.py", line 201, in encode
    chunks = list(chunks)
  File "/tmp/.mount_electrvOLK31/usr/lib/python3.9/json/encoder.py", line 431, in _iterencode
    yield from _iterencode_dict(o, _current_indent_level)
  File "/tmp/.mount_electrvOLK31/usr/lib/python3.9/json/encoder.py", line 405, in _iterencode_dict
    yield from chunks
  File "/tmp/.mount_electrvOLK31/usr/lib/python3.9/json/encoder.py", line 405, in _iterencode_dict
    yield from chunks
  File "/tmp/.mount_electrvOLK31/usr/lib/python3.9/json/encoder.py", line 405, in _iterencode_dict
    yield from chunks
  File "/tmp/.mount_electrvOLK31/usr/lib/python3.9/json/encoder.py", line 353, in _iterencode_dict
    items = sorted(dct.items())
TypeError: '<' not supported between instances of 'int' and 'str'