Solution : https://service.sap.com/sap/support/notes/989553 (SAP Service marketplace login required)
Key words :
year-dependent fiscal year variants, fiscal year variant defined, call transaction faglb03, general ledger account, attached correction instructions, relevant support package, 'year-dependent', grid display, 'month' field, company code
Related Notes :
| 1580227 | FAGLB03: "Month" field incorrect for individual account |
| 1062329 | FAGLB03: 'Month' in ledger with more than 16 periods |
| 672255 | Shortened fiscal year/changing fiscal periods |