File "/home/user/.local/lib/python3.6/site-packages/electrum/gui/qt/address_list.py", line 226, in create_menu
    coins = self.wallet.get_spendable_coins(addrs, config=self.config)
  File "/home/user/.local/lib/python3.6/site-packages/electrum/wallet.py", line 445, in get_spendable_coins
    nonlocal_only=nonlocal_only)
  File "/home/user/.local/lib/python3.6/site-packages/electrum/address_synchronizer.py", line 410, in f
    return func(self, *args, **kwargs)
  File "/home/user/.local/lib/python3.6/site-packages/electrum/address_synchronizer.py", line 762, in get_utxos
    utxos = self.get_addr_utxo(addr)
  File "/home/user/.local/lib/python3.6/site-packages/electrum/address_synchronizer.py", line 694, in get_addr_utxo
    coins.pop(txi)