Unable to delete NDMP host

Hi All,

I m trying to delete an NDMP host but when I do so, I get the below error:

Unable to remove NDMP Host from the device configuration. Invalid host(88)

Please let me know how this can be deleted.Also note that this NDMP host is using Default credentials.

We are using Netbackup 7.5.0.4, Master server: Windows 2008 R2