diff --git a/apps/product/web/api/v1/serializers/quota_distribution_serializers.py b/apps/product/web/api/v1/serializers/quota_distribution_serializers.py
index c4c1d03..ef6eb93 100644
--- a/apps/product/web/api/v1/serializers/quota_distribution_serializers.py
+++ b/apps/product/web/api/v1/serializers/quota_distribution_serializers.py
@@ -61,15 +61,13 @@ class QuotaDistributionSerializer(serializers.ModelSerializer):
 
         # if parent distribution is none compare with main quota weight
         # else compare with parent distribution weight
-        if not parent_distribution:
-            if total + amount > quota.quota_weight:
-                raise QuotaWeightException()
-        else:
-            children_total = parent_distribution.children.all().aggregate(
-                total=models.Sum('weight')
-            )['total'] or 0
-            if children_total + amount > parent_distribution.weight:
-                raise QuotaWeightException()
+        if not self.instance:
+            if not parent_distribution:
+                if total + amount > quota.quota_weight:
+                    raise QuotaWeightException()
+            else:
+                if parent_distribution.remaining_weight + amount > parent_distribution.remaining_weight:
+                    raise QuotaWeightException()
 
         if self.instance:
             # total warehouse inventory entry
@@ -81,15 +79,16 @@ class QuotaDistributionSerializer(serializers.ModelSerializer):
             if total_entry > self.instance.weight:
                 raise APIException("وزن وارد شده کمتر از وزن ورودی به انبار است", code=403)  # noqa
 
+            if self.instance.parent_distribution:
+                if self.instance.parent_distribution.remaining_weight + amount > self.instance.parent_distribution.remaining_weight:
+                    raise QuotaWeightException()
+
             # if weight is more than distribution remaining weight
             if not self.instance.parent_distribution:
                 if amount + total > self.instance.quota.quota_weight:
                     raise APIException("وزن وارد شده بیشتر از وزن باقیمانده است", code=403)  # noqa
             else:
-                children_total = self.instance.parent_distribution.children.all().aggregate(
-                    total=models.Sum('weight')
-                )['total'] or 0
-                if children_total + amount > self.instance.parent_distribution.weight:
+                if self.instance.parent_distribution.remaining_weight + amount > self.instance.parent_distribution.remaining_weight:
                     raise QuotaWeightException()
 
         return data