A Datastore has files of VM residing on another datastore. What should I do?

I have a datastore (INHYDPROD-LUN01)) which I want to delete and while the Virtual machines tab in the Datastore does not show any VM's it some how showed that its 400GB occupied. So I went in and checked the "Browse Datastore" button and found files related to an active virtual machine residing on another datastore (INHYDDEV-QA-LUN-417). Its up and active and running. I have migrated this virtual machine from the production lun to the Dev-417 LUN.

Now I want to delete the Prod LUN. Can I do that?

Attached are the pictures for your reference.
Druva Simha KolliSr. IT Systems AnalystAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
If you have migrated using Storage vMotion the virtual machine to another LUN, this LUN should be safe to delete.

Is this after the migration? there are virtual machine disks left ?

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