How to understand 'conflicted' tx's

[xearp]

In one of my Bitcoin-QT wallets I have several 'conflicted' transactions from several years ago. They were sent to satoshi dice, and the txids don't appear on the blockchain.

I tried rescanning my wallet and they still show up as conflicted. The balance does not show up as pending or confirmed.

Status: conflicted with a transaction with 408420 confirmations
Transaction fee: -0.00100000 BTC

Do these coins still exist somewhere in my wallet?
Is there a way of recovering them using wallet surgery or another method?

[1715146715]

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[1715146715]

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[1715146715]

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[1715146715]

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[OgNasty]

It sounds like the coins were double spent and confirmed on a transaction that wasn't sent to one of your addresses.

If you gave the txids of the transaction and the conflicting transaction then someone could likely tell you exactly what happened.

[Potato Chips]

Status: conflicted with a transaction with 408420 confirmations
Transaction fee: -0.00100000 BTC

Looks a double-spend indeed. When transactions are involved in double-spending (spends the same input/s), the first one which gets included in a block will be the valid one and the rest won't ever be confirmed.

So if Transaction A which is the invalid one spends the exact same inputs (e.g. .01, .02, .01) as Transaction B which is already confirmed then those coins are already spent so there is nothing to recover.

[NeuroticFish]

There was a quite similar question in 2016 and the answer was to use zapwallettxes. You could take a look at that thread: https://bitcointalk.org/index.php?topic=1330415
Also you should move your question into Bitcoin Technical Support, to get a better chance to get answers from qualified people.

[bob123]

Since the transactions show conflict and the transaction ID is not valid, you can be sure that the other transaction (which yours conflict with) got included into a block.
Therefore the coins 'do not exist in your wallet' (to be more precisely, they are not associated to the public keys you think they should be) and you can not 'get them back' by doing something with your wallet file.

Using zapwallettxes as proposed by NeuroticFish will probably clear this up, but won't get your 'coins back into your wallet'.

[Thirdspace]

Status: conflicted with a transaction with 408420 confirmations
Transaction fee: -0.00100000 BTC

Do these coins still exist somewhere in my wallet?
Is there a way of recovering them using wallet surgery or another method?

no, they don't exist in your wallet anymore, you have used them in another transaction
easy way to figure this out is to check the balance of sender address on a public block explorer
if there is an utxo shown (balance discrepancy) on the explorer but not on your wallet, then you can recover it
and to fix/clear those conflict notifications, follow NeuroticFish suggestion, zapwallettxes should do the job