Resolving the Grayed-Out "Create Purchase Order" Button in Fiori's Process Purchase Requisitions App

Hello SAP Community, I wanted to share a quick workaround I recently learnt while working with a practice ad-hoc procurement scenario in SAP S/4HANA using Fiori apps. The Scenario: When I attempted to convert an ad-hoc Purchase Requisition (created using manual short text without a pre-existing Material Master Record) into a Purchase Order using the Process Purchase Requisitions app, I found out that the Create Purchase Order button was still grayed out even after I selected the line item. The Root Cause: The standard processing view expects a valid Source of Supply (Supplier) to be assigned a