[UPD] Use sale_description in product description on SO

models/sale_project.py

@@ -327,12 +327,17 @@ class SaleProject(models.Model):
                     data.update(
                         {
                             "order_id": self.sale_order_id.id,
-                            "name": "Projet " + self.name + " - " + product_tmpl.name,
+                            "name": "Projet "
+                            + self.name
+                            + " - "
+                            + product_tmpl.product_variant_id.get_product_multiline_description_sale(),
                             "product_id": product_tmpl.product_variant_id.id,
                             "sale_project_id": self.id,
                         }
                     )
-                    self.env["sale.order.line"].with_context(default_project_id=False).create(data)
+                    self.env["sale.order.line"].with_context(
+                        default_project_id=False
+                    ).create(data)
         self.sale_order_id.clean_sale_order()