Syntax: WBADMIN DELETE CATALOG -quiet Description: Deletes the backup catalog that is stored on the local computer. Use this ...

Syntax: WBADMIN DELETE CATALOG
    [-quiet]

Description:  Deletes the backup catalog that is stored on the local computer.
Use this command when the backup catalog has been corrupted and you cannot 
restore it using WBADMIN RESTORE CATALOG.
To use this command, you must be a member of the Backup Operators group 
or Administrators group. 

Parameters:
-quiet         Runs the command with no prompts to the user.

Remarks:  If you delete the backup catalog for a computer, you will not be 
able to access the backups of that computer using the Windows Server Backup 
snap-in. In this case, if you can access another backup location, use WBADMIN 
RESTORE CATALOG to restore the backup catalog from that location. You should 
create a new backup once your backup catalog is deleted.