diff --git a/apps/inm/serializers.py b/apps/inm/serializers.py
index 8490177d..5174c439 100644
--- a/apps/inm/serializers.py
+++ b/apps/inm/serializers.py
@@ -212,11 +212,18 @@ class MIOItemCreateSerializer(CustomModelSerializer):
                 mio_type = mio.type
                 if mio_type != "pur_in" and mio_type != "other_in":
                     wprIds = [i["wpr"].id for i in mioitemw]
-                    mb_ids = list(Wpr.objects.filter(id__in=wprIds).values_list("mb__id", flat=True).distinct())
-                    if len(mb_ids) == 1 and mb_ids[0] == instance.mb.id:
-                        pass
-                    else:
-                        raise ParseError(f'{batch}物料明细中存在{len(mb_ids)}个不同物料批次')
+                    if instance.mb:
+                        mb_ids = list(Wpr.objects.filter(id__in=wprIds).values_list("mb__id", flat=True).distinct())
+                        if len(mb_ids) == 1 and mb_ids[0] == instance.mb.id:
+                            pass
+                        else:
+                            raise ParseError(f'{batch}物料明细中存在{len(mb_ids)}个不同物料批次')
+                    elif instance.wm:
+                        wm_ids = list(Wpr.objects.filter(id__in=wprIds).values_list("wm__id", flat=True).distinct())
+                        if len(wm_ids) == 1 and wm_ids[0] == instance.wm.id:
+                            pass
+                        else:
+                            raise ParseError(f'{batch}物料明细中存在{len(wm_ids)}个不同物料批次')
                 for item in mioitemw:
                     if item.get("wpr", None) is None and mio_type != "pur_in" and mio_type != "other_in":
                         raise ParseError(f'{item["number"]}_请提供产品明细ID')