diff --git a/sf_manufacturing/models/mrp_workorder.py b/sf_manufacturing/models/mrp_workorder.py
index 4180bcce..011482d9 100644
--- a/sf_manufacturing/models/mrp_workorder.py
+++ b/sf_manufacturing/models/mrp_workorder.py
@@ -1383,7 +1383,16 @@ class ResMrpWorkOrder(models.Model):
                     boolean = True
             if not boolean:
                 raise UserError('制造订单【%s】缺少组件的序列号信息！' % self.production_id.name)
-            self.pro_code = self.production_id.move_raw_ids[0].move_line_ids[0].lot_id.name
+            self.pro_code = False  # 默认值
+            if (
+                    self.production_id
+                    and self.production_id.move_raw_ids
+                    and len(self.production_id.move_raw_ids) > 0
+                    and self.production_id.move_raw_ids[0].move_line_ids
+                    and len(self.production_id.move_raw_ids[0].move_line_ids) > 0
+                    and self.production_id.move_raw_ids[0].move_line_ids[0].lot_id
+            ):
+                self.pro_code = self.production_id.move_raw_ids[0].move_line_ids[0].lot_id.name
             # cnc校验
             if self.production_id.production_type == '自动化产线加工':
                 cnc_workorder = self.search(