diff --git a/CHANGELOG.md b/CHANGELOG.md
index 861b0ea1cf4e..ab68f840a13f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -40,6 +40,7 @@
 
 ### Fixes
 
+- [#9652](https://github.com/blockscout/blockscout/pull/9652) - Remove duplicated tx hashes while indexing OP batches
 - [#9646](https://github.com/blockscout/blockscout/pull/9646) - Hotfix for Optimism Ecotone batch blobs indexing
 - [#9640](https://github.com/blockscout/blockscout/pull/9640) - Fix no function clause matching in `BENS.item_to_address_hash_strings/1`
 - [#9638](https://github.com/blockscout/blockscout/pull/9638) - Do not broadcast coin balance changes with empty value/delta
diff --git a/apps/indexer/lib/indexer/fetcher/optimism/txn_batch.ex b/apps/indexer/lib/indexer/fetcher/optimism/txn_batch.ex
index fa0dfcd371d4..88adfc74dbb8 100644
--- a/apps/indexer/lib/indexer/fetcher/optimism/txn_batch.ex
+++ b/apps/indexer/lib/indexer/fetcher/optimism/txn_batch.ex
@@ -615,7 +615,7 @@ defmodule Indexer.Fetcher.Optimism.TxnBatch do
 
     seq = %{
       id: frame_sequence_id,
-      l1_transaction_hashes: Enum.reverse(l1_transaction_hashes),
+      l1_transaction_hashes: Enum.uniq(Enum.reverse(l1_transaction_hashes)),
       l1_timestamp: channel.l1_timestamp
     }