That means your transaction has not yet been rejected by some nodes and the explorer where you check this transaction is still on their nodes.
I suggest try to copy the TXID of this transaction and paste it to another explorer check the list below

- https://en.bitcoin.it/wiki/Block_chain_browser

If you can't find this TXID on some blockchain explorer it means it's already rejected by some nodes you should now be able to re-send it.