[fix] 修改问题

jzjx_project/models/inherit_roke_work_order.py

@@ -79,4 +79,4 @@ class InheritWorkOrder(models.Model):
             previous_multiple = previous.task_id.bending_qty / self.task_id.plan_qty
         else:
             previous_multiple = previous.routing_line_id.multiple
-        return multiple / previous_multiple
+        return (multiple / previous_multiple) if previous_multiple else 0