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I installed Prestashop 1.6.0.5 with advanced stock management. When I create a supply order and import supply order details (order status is "in process of creation") the available quantity of products is 0. It's ok. I change supply order status to "Order validated". Available quantity of products is 0. Okey. Then I change supply order status to "Pending receipt". Unexpectedly Available quantity of products became the same as I imported. But the products have been not received yet! Then I Update ongoing receipt of products. Supply order status is changed to "Order received completely". And products available quantity became twice bigger then I imported. Also I noticed when supply order is big (about some hundreds of products) and updating process fails in the center (white screen) and then continued, available quantity became even thrice bigger. So what do I need to do, to make it work normal?