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When i sendrawtransaction to bitcoind, i get error (exceptions) 18: txn-mempool-conflict (use Bitcoin JSON-RPC denpamusic/php-bitcoinrpc) But the transaction is sent to the network and is subsequently confirmed.

Example one decoded transaction : https://jsfiddle.net/rn58a4j6/

then i send this transaction: 94ec12fc463230b4285a29b047608627c05572a4c6eabe6688a201ce49ae72f7

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  • looks like you already submitted the transaction – JBaczuk Aug 29 '18 at 16:30
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To solve this problem, I restarted bitcoind.

I think that maybe when i was developing my project, I made a bad transaction and it saved in mempool

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