diff --git a/crates/sui-indexer-alt/src/handlers/sum_packages.rs b/crates/sui-indexer-alt/src/handlers/sum_packages.rs
index 6bf0176fd8ca8c..d8c3254c616194 100644
--- a/crates/sui-indexer-alt/src/handlers/sum_packages.rs
+++ b/crates/sui-indexer-alt/src/handlers/sum_packages.rs
@@ -1,7 +1,7 @@
 // Copyright (c) Mysten Labs, Inc.
 // SPDX-License-Identifier: Apache-2.0
 
-use std::sync::Arc;
+use std::{collections::BTreeMap, sync::Arc};
 
 use anyhow::{anyhow, Result};
 use diesel::{upsert::excluded, ExpressionMethods};
@@ -57,13 +57,16 @@ impl Processor for SumPackages {
 
 #[async_trait::async_trait]
 impl Handler for SumPackages {
-    type Batch = Vec<Self::Value>;
+    type Batch = BTreeMap<Vec<u8>, StoredPackage>;
 
     fn batch(batch: &mut Self::Batch, values: Vec<Self::Value>) {
-        batch.extend(values);
+        for value in values {
+            batch.insert(value.package_id.clone(), value);
+        }
     }
 
-    async fn commit(values: &Self::Batch, conn: &mut db::Connection<'_>) -> Result<usize> {
+    async fn commit(batch: &Self::Batch, conn: &mut db::Connection<'_>) -> Result<usize> {
+        let values: Vec<_> = batch.values().cloned().collect();
         let updates = values.chunks(CHUNK_ROWS).map(|chunk| {
             diesel::insert_into(sum_packages::table)
                 .values(chunk)