Comment 3 for bug 1875937

Yes, this is clear as per design of the glacier storage backend. However, the problem ist not the restore action, the problem is that when duplicity wants to restart a backup (because e.g. the upload failed recently) it wants to download the latest archive to verify the use of the same keys.

This is not possible with glacier and therefore if the upload of a backup to glacier fails the backup can never be continued.