[FIX] deletion of sol

models/sale_order.py

@@ -30,7 +30,9 @@ class SaleOrder(models.Model):
         current_inter = list()
         for project in self.sale_project_ids:
             for inter in project.intervention_ids:
-                current_inter.append((project.id, inter.intervention_type_id.id))
+                current_inter.append(
+                    (project.id, inter.intervention_type_id.product_variant_id.id)
+                )
         for sol in self.order_line:
             if (
                 sol.product_id
@@ -42,4 +44,3 @@ class SaleOrder(models.Model):
         if self.state == "draft":
             self.write({"state": "sent"})
         return self.env.ref("sale.action_report_saleorder").report_action(self)
-