In system, user has created PO with account assignment category "K". At the time of PO creation, system is picking G/L account "6000020" based on material/service group. After some days he changed the G/L account with "6000030" manually it time account assignment tab. Now i want to see change log who have change that G/L account from "60"00020"to "6000030". Also i checked the change history table "CDHRD"& "CDPOS" but there are no any G/L history. So kindly suggest way forward.