Backing up Duplicati configs for DR is a prior comment (and links to even older ones). Basically, be very sure you save things like passwords and destination information needed for a direct restore, e.g. of latest versions. Configuration export may be handy for starting a new backup of the same configuration. Getting full access to historical versions in a convenient way (unlike a direct restore) might require recreating the full local database and can be very slow for large backups. For this reason, some people back up the local per-job database in a separate backup job, but experience says that it tends not to deduplicate well due to the extent of its changes.