Ho do i add PO number to the 'Receivables Aging by General Ledger Account Report'

Summary:

Need to Add PO Number detail in 'Receivables Aging by General Ledger Account Report'.

For that we are trying to customize the same for that but as the main query is driven by AR_ARXAGMW_XMLP_PKG and there are no related fields for the same, we are unable to do the same.
please help in adding the PO number to the report.

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