Solution : https://service.sap.com/sap/support/notes/112745 (SAP Service marketplace login required)
Key words : 
additional key words euro, reservation/dependent requirement, -stock material components, resb-dbskz = 'f', resb-flgex = 'x', company code currency, table resb, resb-waers, currency changeover, plannedorder currency
Related Notes : 
       
| 426772 | |
| 163359 | |
| 134959 | PM/SM: no Euro conversion for price in RESB |