Unable to Delete vDisk Version Because "Delete" Option is Grayed Out

Unable to delete vDisk version because the "Delete" option is grayed out since one target device is still showing that is connected to it. The VM on the Hypervisor is already down, but PVS console shows the device is still Active and connected to the vDisk...

PowerShell script to check what vdisk version is being used

Looking for assistance with powershell script to check what vdisk version on the PVS is being used by the VDI desktops Target Devices...