Bitcoin Core flags v30.0–30.1 migration bug; advises waiting for v30.2, January 7

Bitcoin Core developers cautioned that versions 30.0 and 30.1 contain a migration vulnerability affecting legacy wallets, and advised users to postpone migrations until v30.2. The issue risks unintended wallet deletion and fund loss if backups are missing, while regular operations remain unaffected; the team is removing the affected builds and preparing a fix.