Change Order Status PS_OS_CANCELED to Decrease QTY instead to Increase

[tapukatata]

I am using Prestashop 1.7.6.9 I need to set me PS_OS_CANCELED status to decrease product stock QTY. 

I would be happy if anyone can help me with that.

Thank you!

[Ress]

You should make the changes in the OrderHistory class, changeIdOrderState () method.

From what I see, you will need to change in this foreach:

foreach ($order->getProductsDetail() as $product) {

You should verify exactly what condition it meets, and change the updateQuantity method to decrease the products.