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 :
bitcoin-cli rescanblockchain Or start Bitcoin Core with: bitcoin core walletdat upd
bitcoind -reindex This rebuilds the block index (takes 6+ hours). If your wallet.dat is corrupted and won't load: bitcoind -salvagewallet This reads through the BDB file
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. For the most robust wallet
# 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.