diff --git a/hb_server/apps/wpm/serializers.py b/hb_server/apps/wpm/serializers.py
index 2c9e078..0458322 100644
--- a/hb_server/apps/wpm/serializers.py
+++ b/hb_server/apps/wpm/serializers.py
@@ -101,7 +101,7 @@ class PickSerializer(serializers.Serializer):
                         first_step = Step.objects.get(pk=sp.steps[0]['id'])
                         wproducts.update(step=first_step, is_executed=False, 
                         act_state=WProduct.WPR_ACT_STATE_DOING, is_hidden=False, warehouse=None,
-                        subproduction_plan=sp, production_plan=sp.production_plan)
+                        subproduction_plan=sp)
             sp.is_picked=True
             sp.state = SubProductionPlan.SUBPLAN_STATE_WORKING #生产中
             sp.state_date_real = timezone.now() #实际开工日期