diff --git a/internal/mq/msgstream/mq_msgstream.go b/internal/mq/msgstream/mq_msgstream.go
index 1f9f4f8274..429dec7bf8 100644
--- a/internal/mq/msgstream/mq_msgstream.go
+++ b/internal/mq/msgstream/mq_msgstream.go
@@ -669,6 +669,10 @@ func (ms *MqTtMsgStream) Close() {
 	ms.mqMsgStream.Close()
 }
 
+func isDMLMsg(msg TsMsg) bool {
+	return msg.Type() == commonpb.MsgType_Insert || msg.Type() == commonpb.MsgType_Delete
+}
+
 func (ms *MqTtMsgStream) bufMsgPackToChannel() {
 	ms.closeRWMutex.RLock()
 	defer ms.closeRWMutex.RUnlock()
@@ -760,7 +764,7 @@ func (ms *MqTtMsgStream) bufMsgPackToChannel() {
 			idset := make(typeutil.UniqueSet)
 			uniqueMsgs := make([]TsMsg, 0, len(timeTickBuf))
 			for _, msg := range timeTickBuf {
-				if idset.Contain(msg.ID()) {
+				if isDMLMsg(msg) && idset.Contain(msg.ID()) {
 					log.Warn("mqTtMsgStream, found duplicated msg", zap.Int64("msgID", msg.ID()))
 					continue
 				}
diff --git a/internal/mq/msgstream/mq_msgstream_test.go b/internal/mq/msgstream/mq_msgstream_test.go
index 76dee14816..f5883b1b12 100644
--- a/internal/mq/msgstream/mq_msgstream_test.go
+++ b/internal/mq/msgstream/mq_msgstream_test.go
@@ -1570,8 +1570,13 @@ func TestStream_RmqTtMsgStream_DuplicatedIDs(t *testing.T) {
 	msgPack1.Msgs = append(msgPack1.Msgs, getTsMsg(commonpb.MsgType_Insert, 1))
 	msgPack1.Msgs = append(msgPack1.Msgs, getTsMsg(commonpb.MsgType_Insert, 1))
 
+	// would not dedup for non-dml messages
 	msgPack2 := MsgPack{}
-	msgPack2.Msgs = append(msgPack2.Msgs, getTimeTickMsg(15))
+	msgPack2.Msgs = append(msgPack2.Msgs, getTsMsg(commonpb.MsgType_Search, 2))
+	msgPack2.Msgs = append(msgPack2.Msgs, getTsMsg(commonpb.MsgType_Search, 2))
+
+	msgPack3 := MsgPack{}
+	msgPack3.Msgs = append(msgPack3.Msgs, getTimeTickMsg(15))
 
 	ctx := context.Background()
 	inputStream, outputStream := initRmqTtStream(ctx, producerChannels, consumerChannels, consumerSubName)
@@ -1580,11 +1585,13 @@ func TestStream_RmqTtMsgStream_DuplicatedIDs(t *testing.T) {
 	assert.Nil(t, err)
 	err = inputStream.Produce(&msgPack1)
 	assert.Nil(t, err)
-	err = inputStream.Broadcast(&msgPack2)
+	err = inputStream.Produce(&msgPack2)
+	assert.Nil(t, err)
+	err = inputStream.Broadcast(&msgPack3)
 	assert.Nil(t, err)
 
 	receivedMsg := consumer(ctx, outputStream)
-	assert.Equal(t, len(receivedMsg.Msgs), 1)
+	assert.Equal(t, len(receivedMsg.Msgs), 3)
 	assert.Equal(t, receivedMsg.BeginTs, uint64(0))
 	assert.Equal(t, receivedMsg.EndTs, uint64(15))
 
@@ -1600,13 +1607,12 @@ func TestStream_RmqTtMsgStream_DuplicatedIDs(t *testing.T) {
 	outputStream.Seek(receivedMsg.StartPositions)
 	outputStream.Start()
 	seekMsg := consumer(ctx, outputStream)
-	assert.Equal(t, len(seekMsg.Msgs), 1)
-	for _, msg := range seekMsg.Msgs {
-		assert.EqualValues(t, msg.BeginTs(), 1)
-	}
+	assert.Equal(t, len(seekMsg.Msgs), 1+2)
+	assert.EqualValues(t, seekMsg.Msgs[0].BeginTs(), 1)
+	assert.Equal(t, commonpb.MsgType_Search, seekMsg.Msgs[1].Type())
+	assert.Equal(t, commonpb.MsgType_Search, seekMsg.Msgs[2].Type())
 
 	Close(rocksdbName, inputStream, outputStream, etcdKV)
-
 }
 
 func TestStream_RmqTtMsgStream_Seek(t *testing.T) {