diff --git a/apps/wpm/serializers.py b/apps/wpm/serializers.py
index 4fa5dc0a..6ccbf7eb 100644
--- a/apps/wpm/serializers.py
+++ b/apps/wpm/serializers.py
@@ -530,20 +530,20 @@ class MlogbInSerializer(CustomModelSerializer):
         model = Mlogb
         fields = ['id', 'mlog', 'mtask', 'wm_in', 'count_use', 'count_pn_jgqbl',
                   'count_break', 'note', "parent"]
-        extra_kwargs = {'count_use': {'required': True}, 'mtask': {'required': True},
+        extra_kwargs = {'count_use': {'required': True}, 'mtask': {'required': False},
                         'wm_in': {'required': True, "allow_empty": False}}
     
     def validate(self, attrs):
         mlog: Mlog = attrs['mlog']
-        mtask: Mtask = attrs['mtask']
-        if mtask.state != Mtask.MTASK_ASSGINED:
+        mtask: Mtask = attrs.get("mtask", None)
+        if mtask and mtask.state != Mtask.MTASK_ASSGINED:
             raise ValidationError('该任务非下达中不可选择')
         wm_in: WMaterial = attrs['wm_in']
         if wm_in.state in [WMaterial.WM_OK, WMaterial.WM_REPAIR]:
             pass
         else:
             raise ValidationError('非合格/返修品不可使用')
-        if mlog.route != mtask.route:
+        if mtask and mlog.route != mtask.route:
             raise ValidationError('工序不匹配')
         route = mlog.route
         attrs['material_in'] = wm_in.material
diff --git a/apps/wpm/views.py b/apps/wpm/views.py
index 68f0d083..4305ff23 100644
--- a/apps/wpm/views.py
+++ b/apps/wpm/views.py
@@ -542,7 +542,7 @@ class MlogbInViewSet(CreateModelMixin, UpdateModelMixin, DestroyModelMixin, Cust
         mlog:Mlog = mlogbin.mlog
         route:Route = mlog.route
         # 以及mlogbw
-        if mlogbin.mtask and mlogbin.material_in:
+        if mlogbin.material_in:
             material_in:Material = mlogbin.material_in
             material_out:Material = mlog.material_out
             if material_out is None: