diff --git a/apps/wpm/services.py b/apps/wpm/services.py
index 244df81f..c735c869 100644
--- a/apps/wpm/services.py
+++ b/apps/wpm/services.py
@@ -30,6 +30,8 @@ def generate_new_batch(old_batch: str, mlog: Mlog):
         number = mlog.equipment.number if mlog.equipment else ''
         if number:
             new_batch = f'{new_batch}>{number}'
+        if mlog.index:
+            new_batch = f'{new_batch}>{mlog.index}'
     return new_batch
 
 def find_material_can_change(material: Material, mgroup_to: Mgroup):