diff --git a/CHANGELOG_UNRELEASED.md b/CHANGELOG_UNRELEASED.md
index 52d9bfaf14..f589587ffd 100644
--- a/CHANGELOG_UNRELEASED.md
+++ b/CHANGELOG_UNRELEASED.md
@@ -18,6 +18,7 @@
 
 ### Emitter & Flusher
 
+- (bugs) [\#2505](https://github.com/bandprotocol/bandchain/pull/2505) fix bug related ds os table.
 - (feat) [\#2476](https://github.com/bandprotocol/bandchain/pull/2476) Implemented `historical_bonded_token_on_validators` table
 - (impv) [\#2495](https://github.com/bandprotocol/bandchain/pull/2495) Implemented `historical_oracle_statuses` table
 - (impv) [\#2452](https://github.com/bandprotocol/bandchain/pull/2452) Implemented view table to calculate oracle script response time
diff --git a/flusher/flusher/handler.py b/flusher/flusher/handler.py
index 55eee88aeb..f76324f070 100644
--- a/flusher/flusher/handler.py
+++ b/flusher/flusher/handler.py
@@ -118,7 +118,7 @@ def handle_new_raw_request(self, msg):
         self.handle_update_related_ds_os(
             {
                 "oracle_script_id": self.conn.execute(
-                    select([requests.c.oracle_script_id]).where(accounts.c.id == msg["request_id"])
+                    select([requests.c.oracle_script_id]).where(requests.c.id == msg["request_id"])
                 ).scalar(),
                 "data_source_id": msg["data_source_id"],
             }