After PIT restore, "The host ID does not exist" error appears
After a point in time (PIT) restore operation (which may include either a Full File System restore or a BMR restore), the error message The host ID does not exist appears.
In this scenario, a full backup is taken when a SERVICE_USER as root/administrator account is configured. This account takes the backup of the NetBackup installed binaries with root/administrator ownership. Before a restore, SERVICE_USER is configured with an account other than root/administrator, and then an incremental backup is taken where the service user is backed up as part of bp.conf. In a PIT restore operation with the incremental backup, the SERVICE_USER entry gets restored. However, the binaries are restored in the root account ownership.
Workaround:
After changing the service user, you must take a full backup, whether it is a MS-Windows\Standard Policy for File System or BMR policy configuration.