File "/home/ondra/Electrum-4.1.2/electrum/gui/qt/channel_details.py", line 117, in on_htlc_failed
    self.move('inflight', 'failed', payment_hash)
  File "/home/ondra/Electrum-4.1.2/electrum/gui/qt/channel_details.py", line 80, in move
    row_idx = self.keyname_rows[fro].pop(payment_hash)