diff --git a/apps/wpm/services.py b/apps/wpm/services.py
index 756999c1..3a701669 100644
--- a/apps/wpm/services.py
+++ b/apps/wpm/services.py
@@ -224,7 +224,6 @@ def mlog_submit(mlog: Mlog, user: User, now: Union[datetime.datetime, None]):
                     elif isinstance(mlog_or_b, Mlogb):
                         wm.batch_ofrom = mlog_or_b.batch_ofrom
                         wm.material_ofrom = mlog_or_b.material_ofrom
-                    wm.batch_ofrom = mlog_or_b
                 wm.save()
         
     mlog.submit_time = now