Solution : https://service.sap.com/sap/support/notes/62435 (SAP Service marketplace login required)
Key words : 
additional key words manual clearing, program sapmf05a reads table bsis, gr/ir clearing account, purchase order number/item, enter document number intervals, purchase order number, selection 'document number', warning message f5170 ', individual document numbers, index tables bsis
Related Notes : 
       
| 152335 | Field EBELN in line layout variant for cust./vendor |