Never mind. I figured it out. I restarted the Electrum client and then I could sweep back the coins to Electrum again.

I guess I should have tried that before shouting for help.

 

Hi,

I imported my coins from my Bitcoin-qt wallet into Electrum using this guide: https://en.bitcoin.it/wiki/Transferring_coins_from_Bitcoin-Qt_to_Electrum.

After this I accidentally transfered some of those coins back to the same address, thus landing them in my Bitcoin-qt wallet again I would suppose. When trying to sweep them back again into my Electrum wallet I get an error saying "error: The transaction was rejected by network rules.  (18: bad-tens-inputs-spent)".

How can I get my coins back into my Electrum wallet again? Currently my Bitcoin-qt client is not synced and won't be for several days (slow machine) so I had hoped that I could get the coins back into Electrum in some other way than waiting for the sync to be done.

Thanks in advance.