Solution : https://service.sap.com/sap/support/notes/333711 (SAP Service marketplace login required)
Key words :
choose menu path 'environment -> events', additional key words ob29, enter 'table/view' v_t009_a, fiscal year variants, deleted table entries, gu506 - posting period, fiscal year variant, 'form routine' add_deleted_key, 'form routine' add_deleted_keys, attached advance corrections
Related Notes :
| 672255 | Shortened fiscal year/changing fiscal periods |