Powershell script to clear CBT

function Clear-CBTFlag($targetVM) {
    $vmview = $targetVM | Get-View
    $snapname = "Disable CBT $(Get-Date -f yyyyMMdd_HHmmss)"

    if (!$vmview.Config.ChangeTrackingEnabled){
        "Error: CBT flag is not set on this VM  $targetVM"
        return
    }
    $spec = New-Object VMware.Vim.VirtualMachineConfigSpec
    $spec.changeTrackingEnabled = $false
    $vmview.ReconfigVM($spec)
    sleep 10
    $targetVM | New-Snapshot -Name $snapname
    sleep 5
    $targetVM | Get-Snapshot -Name $snapname | Remove-Snapshot -Confirm:$false
    "Disabling CBT for $targetVM"
}