Users with very old, unnamed wallet.dat files (typically from before version 0.21) who attempt to use the built-in migration tool to convert to the modern "Descriptor" format while pruning is enabled.
Updating the Bitcoin Core wallet.dat file involves backing up data, updating the software, and migrating from legacy formats to descriptor wallets to ensure security and compatibility Bitcoin Forum . The process often requires running the migratewallet
In most cases, Bitcoin Core handles the update automatically. When you launch a newer version of the software, it detects the older database version and prompts you to upgrade. bitcoin core walletdat upd
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❗ This could produce a corrupt or inconsistent backup. Users with very old, unnamed wallet
If you are looking at updating your Bitcoin Core wallet.dat file, you should proceed with extreme caution. As of early , a critical bug was identified in specific versions of the software that could lead to permanent loss of funds. ⚠️ Critical Warning: Versions 30.0 & 30.1
to export keys to a text file, which can then be imported into a fresh modern wallet using importwallet loadwallet Key Locations for wallet.dat How to Find a Lost wallet.dat File on Your Computer When you launch a newer version of the
Updating the software usually handles the wallet.dat file automatically. Bitcoin Core is designed with backward compatibility in mind.