FRM-40212: Invalid value for field QUICK_PO_NUMBER

FRM-40212: Invalid value for field QUICK_PO_NUMBER

We are receiving the above error when we try to match PO.

PO is approved and Open.

PO org_id and AP org_id are same

Supplier Site is set for both Purchasing and Payment

select ph.po_number,

ph.po_header_id,

pv.vendor_name,

ph.org_id,

mo_global.get_ou_name(ph.org_id) operating_unit,

ph.Buyer,

ph.po_type

from po_headers_ap_v ph, po_vendors pv, financials_system_params_all fsp

where ph.vendor_id = pv.vendor_id

and ph.approved_flag = 'Y'

and (nvl(ph.closed_code, 'X') <> 'FINALLY CLOSED')