Powershell modules to remove snapmirror does not clean base snapshot

I have below code

Invoke-NcSnapmirrorRelease -Source $vsm.SourceLocation -Destination $vsm.DestinationLocation -Confirm:$false -ErrorAction Stop

 Remove-NcSnapmirror -Source $vsm.SourceLocation -Destination $vsm.DestinationLocation -Confirm:$false -ErrorAction Stop

when i remove the snapmirror relationship it does not remove base snapshot  , the relationship type here is DP between two different cluster.

is there any option I am missing here?

I am running above two from remote cluster side