bitcoind -reindex This rebuilds the block index (takes 6+ hours). If your wallet.dat is corrupted and won't load:
Disclaimer: This article is for educational purposes. Running Bitcoin Core requires technical proficiency. Always test on a separate machine with a copy of your backup before executing commands on your live financial assets. bitcoin core wallet upgrade, wallet.dat repair, bitcoin core descriptor migration, BTC salvagewallet tutorial, blockchain rescan stuck. bitcoin core walletdat upd
bitcoind -rescan Warning: Do not use -rescan on a pruned node; it will fail. If the node cannot sync, the wallet might be fine. But a reindex helps the wallet read correctly: bitcoind -reindex This rebuilds the block index (takes
bitcoin-cli rescanblockchain Or start Bitcoin Core with: Always test on a separate machine with a
# Dump private keys from old wallet bitcoin-cli dumpwallet "wallet_dump.txt" # Create a new blank descriptor wallet bitcoin-cli createwallet "new_wallet" true true "" false true # Import the dump bitcoin-cli -rpcwallet="new_wallet" importwallet "wallet_dump.txt" Your bitcoin core walletdat upd will likely hit a snag. Here is the debug guide.
bitcoind -salvagewallet This reads through the BDB file dumping recoverable keys. It saves a new file called wallet.dump . You then import that dump into a fresh wallet. For the most robust wallet.dat update :