Fusion OTBI Drill Down to different subject area, linking on column with different name in each area

Summary: Hi, Oracle Fusion OTBI. I'm attempting to drill down from and OTBI Report on "Procurement - Procure to Pay" Subject Area to another report based on "Payables Invoices - Transactions Real Time" passing the Purchase Order Number. In the calling report the column name is "Purchase Order"."Purchase Order Number". In the called report the column name is "General Information"."Identifying PO" and when I do the drill down the PO Number context is loss

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