Bitcoin Core versions 30.0 and 30.1 have a wallet migration error; failure to back up may result in coin loss.

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According to ME News, on January 7th (UTC+8), Bitcoin Core announced a wallet migration bug in Bitcoin Core wallet versions 30.0 and 30.1. In rare cases, migrating an older (BDB) wallet may delete all wallet files on the same node. If these wallets are not backed up, this could result in the loss of funds. Bitcoin Core stated that only the migration process for older wallets is affected. All other uses are unaffected. Users can continue to use Bitcoin Core normally, including using existing wallets and running nodes without wallets. (Source: ME)

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