Invalid Vendor on Converted Purchase Order

When trying to do an update on a converted Purchase Order, error stating Invalid Vendor 

• Munis

• Purchasing

• Vendors

Requisition was created using an On-The-Fly Vendor, and was not fully setup in Vendors program

1. Navigate to Financials>Accounts Payable>Vendor Processing>Vendors

2. Click REQ Vendors in the ribbon

3. In the dropdown select the vendor name that was used

4. Click Accept

5. Enter effective date for changes

6. Click Accept

7. Enter in Vendor Info like normal, Address, Payment Method, Bank Information etc

8. Click Accept to save