PowerCLI and Snapshot -Quiesce option

     I have many scripts running on my environment, and Im using one for create snapshots with another functions, in my environment its necesary use the -Quiesce options for the New-Snapshot PS script, when I run this option :

New-Snapshot -VM $vm -Name <name>  -Quiesce:$true

this display the follow error:

WARNING: 'Quiesced' property of 'Snapshot' object is deprecated and will be removed in a future release.

WARNING: 'Parent' property is obsolete. Use 'ParentSnapshot' instead.

this scares me becouse I NEED this option, you know what it's happen with this option or what will happen with this, how I can replace this option by a "New" option??

Thanks,