File "/usr/local/src/electrum/electrum/gui/qt/channel_details.py", line 87, in do_ln_payment_completed
    self.move('inflight', 'settled', htlc.payment_hash)
  File "/usr/local/src/electrum/electrum/gui/qt/channel_details.py", line 70, in move
    row_idx = self.keyname_rows[fro].pop(payment_hash)