Error in using VDR

I installed VDR successfully and made a scenario to back up VMs to an external USB drive.

I prepared and mounted an external USB drive as "SCSI-1:0".

I made a backup job with specific properties for my test virtual machine (TestVM). It was OK, then I decided to delete the restore points.

I saw these Log today:

12/04/19 7:00:21 PM: Starting Reclaim

12/04/19 7:00:21 PM: Reclaiming destination /SCSI-1:0/...

12/04/19 7:00:31 PM: Deleted restore point 12/04/18 7:00:44 PM for virtual machine TestVM

12/04/19 7:00:37 PM: Deleted restore point 12/04/17 7:00:19 PM for virtual machine TestVM

12/04/19 7:01:07 PM: Task completed successfully

12/04/19 7:01:07 PM: Duration: 00:00:46

12/04/19 7:01:21 PM: Starting Integrity Check

12/04/19 7:01:21 PM: To destination /SCSI-1:0/...

12/04/19 7:01:26 PM: Starting incremental integrity check

12/04/19 8:03:59 PM: Trouble reading from destination, error -2241 ( Destination index invalid/damaged)

12/04/19 8:03:59 PM: Destination "/SCSI-1:0/" will be locked until integrity check succeeds.

12/04/19 8:03:59 PM: 1 task errors

12/04/19 8:03:59 PM: Duration: 01:02:38 (00:00:06 idle/loading/preparing)

Then "SCSI-1:0" was at this status : "can't access destination index"

I restarted the VDR VM and then I unmounted the drive, after that I mounted it again, but the status was the same and these Logs appeared:

 

12/04/22 3:49:54 PM: Starting Recatalog

12/04/22 3:49:54 PM: To destination /SCSI-1:0/...

12/04/22 3:49:55 PM: Can't save destination index, error -1103 ( write protected)

12/04/22 3:49:55 PM: Destination "/SCSI-1:0/" will be locked until integrity check succeeds.

12/04/22 3:49:55 PM: Can't save to destination /SCSI-1:0/, error -1103 ( write protected)

12/04/22 3:49:55 PM: Task incomplete

 

What should I do now?