diff --git a/src/storage/memtable/ob_concurrent_control.cpp b/src/storage/memtable/ob_concurrent_control.cpp
index 56f5434052..9311bfed68 100644
--- a/src/storage/memtable/ob_concurrent_control.cpp
+++ b/src/storage/memtable/ob_concurrent_control.cpp
@@ -150,7 +150,9 @@ int check_sequence_set_violation(const concurrent_control::ObWriteFlag write_fla
                   K(writer_tx_id), K(writer_dml_flag), K(writer_seq_no),
                   K(locker_tx_id), K(locker_dml_flag), K(locker_seq_no));
       }
-    } else if (writer_seq_no < locker_seq_no) {
+    }
+
+    if (OB_SUCC(ret) && writer_seq_no < locker_seq_no) {
       // We need guarantee the right sequence of the same txn operations
       ret = OB_ERR_UNEXPECTED;
       TRANS_LOG(ERROR, "wrong row of sequence on one row found", K(reader_seq_no),