Tx Doctor / Solana error library / Transaction already processed
Solana error: Transaction already processed (AlreadyProcessed)
This exact signed transaction was already submitted and processed. It is usually a duplicate submission, not a new failure.
Why it happens
- You pressed the confirm button twice, or the wallet retried while the first submission was still in flight.
- A relayer or bot re-sent the same signed bytes.
- The transaction actually succeeded earlier - check the first submission before retrying.
How to fix it
- Look up the signature on an explorer to see whether the first attempt landed.
- Do not resubmit: build a fresh transaction if you need to act again.
- If your wallet keeps auto-retrying, wait a few seconds before pressing confirm again.
What it looks like in the logs
Transaction simulation failed: This transaction has already been processed
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