Forum Post: Inventory Valuation Report by Period and how to repair

MAS200 4.40  (Sage 100 ERP) We have some data corruption and the IM_PeriodPostingHistory is not in balance with the IM_ItemCost.   Therefore the Inventory Valuation by Period is out of balance to the Inventory Valuation.  I have found the inventory item that is the problem and edited the data to match and it worked!  However, when I ran the utility "Recalculate Item History" it goes back to the original value.  So, I am wondering if another table is populating the IM_PeriodPostingHistory that I need to edit.   Thanks much, Paula