wbadmin delete catalog

Deletes the backup catalog that is stored on the local computer. Use this command when the backup catalog has been corrupted and you can't restore it using the wbadmin restore catalog command. To delete a backup catalog using this command, you must be a member of the Backup Operators group or the Administrators group, or you must have been delegated the appropriate permissions. In addition, you must run wbadmin from an elevated command prompt, by right-clicking Command Prompt, and then selecting Run as administrator.

wbadmin delete catalog [-quiet]