File "/usr/lib/python3/dist-packages/electrum/gui/qt/confirm_tx_dialog.py", line 66, in timer_actions
    self.update_tx()
  File "/usr/lib/python3/dist-packages/electrum/gui/qt/confirm_tx_dialog.py", line 86, in update_tx
    self.tx = self.make_tx(fee_estimator)
  File "/usr/lib/python3/dist-packages/electrum/gui/qt/main_window.py", line 1617, in <lambda>
    is_sweep=is_sweep)
  File "/usr/lib/python3/dist-packages/electrum/wallet.py", line 1129, in make_unsigned_transaction
    raise Exception("Some inputs already contain signatures!")