Bitcoin core qt now uses descriptor wallets. If you've just backed up a private key it's hard to import it. You need to create a legacy wallet and migrate it.
What does descriptor wallet mean? A seed phrase instead of a private key?
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my understanding is that its basically a codified way of asking this OPs question , so if need to import a wallet into new software that new software can access the funds and you can spend from it
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Thanks, that makes sense. It stores the derivation path and script types in the key.
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