Apparently, I made an error several months ago that turned one of my Vendors into a Transit location.  This is evident when I try to receive POs from that Vendor, as the shipment screen shows the following source.

* Source (this vendor):  Physical Locations/[MY COMPANY NAME]: Transit Location
* Source (other vendors, what it should be):  Partner Locations/Vendors

This led to 2 receiving errors, which I forced, resulting in negative inventory valuation for those products when they were sold.
This is the error message I saw when trying to receive the products from this vendor: "You cannot validate a transfer if no quantites are reserved nor done. To force the transfer, switch in edit more and encode the done quantities."

Any ideas on how to change this vendor back to the following source: "Partner Locations/Vendors"?

~John
Odoo 11.0-20180613 (Community Edition)