Why Virtual machine swapfile location is grayed out?

I was trying to figure out why Virtual machine swapfile location is grayed out as shown in the pics below

What I understood is that it inherits properties from cluster. If the cluster has been set to store the swap file on VM then the pic above will be like that.

So you need to choose second option if you have to store swap as per your convenient . Such configuration is done incase where is the requirement to have swap at separate location