Traceback (most recent call last):
  File "electrum\gui\qt\invoice_list.py", line 169, in <lambda>
  File "electrum\gui\qt\send_tab.py", line 585, in do_pay_invoice
  File "electrum\gui\qt\send_tab.py", line 260, in pay_onchain_dialog
  File "electrum\gui\qt\send_tab.py", line 529, in save_pending_invoice
  File "electrum\wallet.py", line 998, in save_invoice
  File "electrum\wallet.py", line 393, in save_db
  File "electrum\wallet_db.py", line 1514, in write
  File "electrum\util.py", line 445, in <lambda>
  File "electrum\util.py", line 441, in do_profile
  File "electrum\wallet_db.py", line 1524, in _write
  File "electrum\storage.py", line 97, in write
PermissionError: [WinError 32] The process cannot access the file because it is being used by another process: 'd:\\dropbox\\electrum\\electrum_data\\wallets\\default_wallet.tmp.17012' -> 'd:\\dropbox\\electrum\\electrum_data\\wallets\\default_wallet'