Actually, this time the migration is reversible, see [1.6.x] Downgrade to 1.5.x. But that is an exception, in general a vault format migration is not reversible.
Yes. But the pre-migrated masterkey file needs to be backuped.
Actually, this time the migration is reversible, see [1.6.x] Downgrade to 1.5.x. But that is an exception, in general a vault format migration is not reversible.
Yes. But the pre-migrated masterkey file needs to be backuped.