We have some closed MOs of one of our final products in stock in F&B industry. While we go over the stock transaction history of that specific MOs. We discover one another item with transaction type 99 in the stock transaction history of those particular MOs. Please keep in mind that while this item is neither a part of the Bill of Material for this product nor a by-product, but still it is shown in the stock transaction history of those particular MOs. In MWS070 while we are sorting through MO number , this item is reflecting below the product number in two transaction lines, as the first line has a negative quantity while the second line has a same positive qtys followed by other items involved in that MO. We are unable to determine why this item appears in stock transaction history. The item which is displaying in TTP 99 is having Location characteristic=3. Any insights on this issue would be highly appreciated?