Rest Erp.BO.DropShipSvc/DropShips - patch - purpoint?

Trying to send a patch call to Erp.BO.DropShipSvc/DropShips.

It requires a value for PurPoint. But when I create a dropship using post on the same call, that is where the PurPoint (I believe), is supposed to be created. But it’s not.

Also when I got back and look at dropships created with the UI, none of those have a value for purpoint. So I’m unsure where to get the value for the rest call to be completed.

I tried sending a empty value but Epicor doesn’t like it.

So where do I get the purpoint value or how do I pass and empty value to make Epicor happy?