Hello,
In Odoo 11, due to incorrect script (now corrected), I have, for some product.template the field outgoing_qty which have a wrong value. It should be zero but it is -1500.
The quantities on hand and reserved are zero.
I don't know how to correct this problem.
Best regards,
Boris Giordanengo
 
                        
The outgoing_qty field in product is a computed field so you can check the _compute_quantities compute method code and see the logic for outgoing_qty calculation and you will be able to solve it.
Thanks Waleed Ali Mohsen. I will try.