Avoid update invoice_shipping_on_delivery before backdate is entered.
Sales Confirmation Backdate - Delivery Costs
![Sales Confirmation Backdate - Delivery Costs [11.0.0.1]](https://d2cogkmcxzch5w.cloudfront.net/web/image/odoo.module.version/2178/icon/Sales%20Confirmation%20Backdate%20-%20Delivery%20Costs%20%5B11.0.0.1%5D?unique=099269b){kind=icon}