diff --git a/apps/wpm/views.py b/apps/wpm/views.py
index d3c9abaf..79175b64 100644
--- a/apps/wpm/views.py
+++ b/apps/wpm/views.py
@@ -493,7 +493,7 @@ class MlogbInViewSet(CreateModelMixin, UpdateModelMixin, DestroyModelMixin, Cust
             if material_out is None:
                 raise ParseError('产物不可为空')
             # 如果是主要输入物料且是主批次，才需生成输出
-            if route.material_in != material_in or mlogbin.parent is None:
+            if route.material_in != material_in or mlogbin.parent is not None:
                 return
             m_dict = {
                 "mtask": mlogbin.mtask,