diff --git a/apps/mtm/serializers.py b/apps/mtm/serializers.py
index 015c5d9c..0355ff2a 100644
--- a/apps/mtm/serializers.py
+++ b/apps/mtm/serializers.py
@@ -212,7 +212,8 @@ class RouteSerializer(CustomModelSerializer):
         if material_out:
             material_out.is_deleted = False
             if material_out.parent is None:
-                material_out.parent = material
+                if material_out.id != material.id:
+                    material_out.parent = material
                 material_out.cate = material.cate
                 material_out.tracking = material_out_tracking
             material_out.save()