Traceback (most recent call last):
  File "electrum/gui/qt/confirm_tx_dialog.py", line 67, in timer_actions
  File "electrum/gui/qt/confirm_tx_dialog.py", line 87, in update_tx
  File "electrum/gui/qt/main_window.py", line 1728, in <lambda>
  File "electrum/wallet.py", line 1332, in make_unsigned_transaction
Exception: Some inputs already contain signatures!