diff --git a/apps/wpm/services.py b/apps/wpm/services.py
index 4840a932..f12122b7 100644
--- a/apps/wpm/services.py
+++ b/apps/wpm/services.py
@@ -339,6 +339,8 @@ def mlog_revert(mlog: Mlog, user: User, now: Union[datetime.datetime, None]):
             
         for mo in m_outs_list:
             mo_ma, mo_batch, mo_count, _, notok_sign = mo
+            if mo_count == 0:
+                continue
             wm_state = WMaterial.WM_OK if notok_sign is None else WMaterial.WM_NOTOK
             lookup = {'batch': mo_batch, 'material': mo_ma, 'mgroup': None, 'notok_sign': notok_sign, 'state': wm_state}
             if stored_mgroup: