Good evening, I am having some issues at the time of assign lots numbers from a products that has already stocks. if I go to the products an click traceability by lots It send me a message about doing a adjustment of inventory but if I go and try to do it It doesn't allow me to put the lot number in the inventory adjustment. 

And If I go directly to the Inventory module and then products lots and serial numbers, when I create a new lots I cant see anything but products with stock 0 and I need to assign lots to products with stocks.