Disable Item Price Auto Add In Sales Order

When creating a new Sales Order to a customer, if one of the items within the Sales Order is not in the customer Selling Price List a new item price is automaticaly created and added to the his price list after saving the doc.
How Can i disable this feature ? I searched within the Selling settings but didnt find. i also tried to block saving this kind of sales order by adding before_save / validate hooks but it seems that the item price addition occurs after

Try disabling this option and check:


It’s Working thanks a lot!

it helped me too! Thanks