Procedure to clear Parent VHD's in Vworkspace

Hi Team ,

i have very vworkspace 8.0MR1 environment and current under migration phase . i have 16 Hyper-v host to cater 1000+ virtual machine. few days back i figure out lot of VHD under Hyper-v host\ parentVHD folder .

when ever update master image it create one Parent VHD under all the hyper-v host attached to Vworkspace.

is their way to remove all unwanted VHD from ParentVHD folder to save some space from SSD disk.

thanks

Ravi