diff --git a/apps/wpm/serializers.py b/apps/wpm/serializers.py
index 7f6847f0..80b514f7 100644
--- a/apps/wpm/serializers.py
+++ b/apps/wpm/serializers.py
@@ -967,7 +967,7 @@ class HandoverSerializer(CustomModelSerializer):
             
         wm:WMaterial = attrs.get('wm', None)
         handoverb = attrs.get('handoverb', [])
-        if wm:
+        if wm and not handoverb:
             attrs['handoverb'] = [{"wm": wm, "count": attrs["count"] }]
             handoverb = attrs['handoverb']
             attrs['batch'] = wm.batch