You have a machine with a backup plan. In a while, you re-register the machine to a different user, but the backup plan still runs although it is not listed among backup plans for this device. If you delete entries about this backup plan via acrocmd, they return in a while.
Once you log in to Backup Console to check the backups of your device/website or your customers' devices/websites, you try to check the recovery points, but receive an error message similar to the following:
Archive server error" and "JWT is issued by unregistered issuer