How can I connect Supplier Quotation to Project?

Hi Everyone!

Am trying to complete our Purchasing Cycle. Am having a hard time because I can’t connect my created Supplier Quotation to specific project. When I try to create PO from created Supplier Quotation and link it to specific project, this error keeps on popping out, "Project must be = ". I think the reason is because there’s no project connected to created SQ.
Appreciate your help