BSEG-GSBER FIELD

IS IT POSSIBLE TO UP DATE BSEG TABLE FOR FIELD GSBER (BUSSINESS AREA).

SUPPOSE , WE HAVE DOCUMENT WITH 4 LINE ITEMS. TWO OF THE LINE ITEMS ARE UPDATED WITH GSBER BUT REMAINING TWO LINE ITEMS ARE NOT UPDATED WITH GSBER. IS THERE ANY TOOL OR PROGRAME TO UPDATE THE REMAING TWO ENTRIES FOR GSBER...

I TRIED BUT NOT ALLOWING THROUGH CODE...

THANKS & REGARDS,