After update to 2.0.8 Error-Duplicati.Library.Main.Operation.BackupHandler-FatalError

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Guessing use:

Release: 2.0.8.1 (beta) 2024-05-07

If you see message that ssh-ed25519 32 host key has changed to an ssh-ed25519 256, with values to the right staying the same, this was a bug fix in SSH.NET to now display key’s length in bits, not bytes.

2.0.8.1 update may request SSH/SFTP ssh-ed25519 host key reverification