Solution : https://service.sap.com/sap/support/notes/553763 (SAP Service marketplace login required)
Key words :
attached advance corrections, call transaction se51, save snd activate, select field list, field rm61w-fixkz, terms material forecast, enter program sapmm61w, rm61w-fixkz, material forecast, field type
Related Notes :
| 820691 | Material forecast: Correction factor is zero |