Solution : https://service.sap.com/sap/support/notes/938653 (SAP Service marketplace login required)
Key words :
terms ekpo-loekz 's' 'l' bus2012 reason, change specific fields, purchase order, locked item, active implementation, badi me_process_po_cust, symptom occurs, existing order, solution implement, correction instructions
Related Notes :
| 850932 | BAPI_PO_CHANGE: Problems when you delete items |