KeyError in aiobtdht/routing_table/bucket.py

[zrthstr]

Any guess what may cause this error in aiobtdht?

Task exception was never retrieved
future: <Task finished name='Task-756289' coro=<DHT._add_or_update_node() done, defined at /home/home_path/dht_poc/venv/lib/python3.11/site-packages/aiobtdht/dht.py:211> exception=KeyError((<aiobtdht.routing_table.node.Node object at 0x7f2f6aaadb50>, <aiobtdht.routing_table.node_stat.NodeStat object at 0x7f2f68361a90>))>
Traceback (most recent call last):
  File "/home/home_path/dht_poc/venv/lib/python3.11/site-packages/aiobtdht/dht.py", line 213, in _add_or_update_node
    self._add_node(id_, addr)
  File "/home/home_path/dht_poc/venv/lib/python3.11/site-packages/aiobtdht/dht.py", line 134, in _add_node
    self.routing_table.add(node_id, addr)
  File "/home/home_path/dht_poc/venv/lib/python3.11/site-packages/aiobtdht/routing_table/__init__.py", line 13, in add
    added = bucket.add(Node(id_, addr))
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/home_path/dht_poc/venv/lib/python3.11/site-packages/aiobtdht/routing_table/bucket.py", line 31, in add
    self._nodes.pop(it)
KeyError: (<aiobtdht.routing_table.node.Node object at 0x7f2f6aaadb50>, <aiobtdht.routing_table.node_stat.NodeStat object at 0x7f2f68361a90>)