diff --git a/apps/warehouse/web/api/v1/serializers.py b/apps/warehouse/web/api/v1/serializers.py
index b822468..9d3ec52 100644
--- a/apps/warehouse/web/api/v1/serializers.py
+++ b/apps/warehouse/web/api/v1/serializers.py
@@ -52,7 +52,7 @@ class InventoryEntrySerializer(serializers.ModelSerializer):
                     raise InventoryEntryWeightException()
 
         # if instance is not exists for create, check entry weight with distribution
-        elif not self.instance:
+        else:
             if total_entered + attrs['weight'] > distribution.weight:
                 raise InventoryEntryWeightException()