diff --git a/apps/wpm/views.py b/apps/wpm/views.py
index 186281d2..f520ceeb 100644
--- a/apps/wpm/views.py
+++ b/apps/wpm/views.py
@@ -590,7 +590,7 @@ class MlogbInViewSet(CreateModelMixin, UpdateModelMixin, DestroyModelMixin, Cust
                 update_dict(m_dict, {"count_real": d_count_real, "count_ok": d_count_ok}))
             if material_in.tracking == Material.MA_TRACKING_SINGLE and material_out.tracking == Material.MA_TRACKING_SINGLE:
                  for mlogbwin in Mlogbw.objects.filter(mlogb=mlogbin).order_by("number"):
-                     wpr_ = mlogbin.wpr
+                     wpr_ = mlogbwin.wpr
                      Mlogbw.objects.get_or_create(wpr=wpr_, mlogb=mlogbout, defaults={"number": wpr_.number, "mlogbw_from": mlogbwin})
         elif mtype == Process.PRO_DIV: # 切分 支持批到批，个到个， 个到批
             div_number = route.div_number