Solution : https://service.sap.com/sap/support/notes/303882 (SAP Service marketplace login required)
Key words :
additional key words /sapapo/dm_order_maintain, structures/sapapo/om_order, apo order header, /sapapo/cif_order_head, order priority, production order, apo system, field priority, prerequisites field, inbound processing
Related Notes :
456776 | R/3-APO: Order priority for internal production orders |
301965 | Order priority lost after retransfer. |