diff --git a/dbms/src/Flash/Coprocessor/DAGStorageInterpreter.cpp b/dbms/src/Flash/Coprocessor/DAGStorageInterpreter.cpp
index f06cce5d272..6561f5af9eb 100644
--- a/dbms/src/Flash/Coprocessor/DAGStorageInterpreter.cpp
+++ b/dbms/src/Flash/Coprocessor/DAGStorageInterpreter.cpp
@@ -492,8 +492,7 @@ void DAGStorageInterpreter::executeCastAfterTableScan(
     auto [has_cast, extra_cast] = addExtraCastsAfterTs(*analyzer, is_need_add_cast_column, table_scan);
     if (has_cast)
     {
-        auto source_num = group_builder.group.size();
-        assert(remote_read_sources_start_index <= source_num);
+        assert(remote_read_sources_start_index <= group_builder.group.size());
         size_t i = 0;
         // local sources
         while (i < remote_read_sources_start_index)
diff --git a/tests/tidb-ci/fullstack-test-dt/issue_1425.test b/tests/tidb-ci/fullstack-test-dt/issue_1425.test
index 994e7d8abeb..245ab34bb27 100644
--- a/tests/tidb-ci/fullstack-test-dt/issue_1425.test
+++ b/tests/tidb-ci/fullstack-test-dt/issue_1425.test
@@ -24,7 +24,7 @@ func> wait_table test t
 
 # note: ref to https://github.com/pingcap/tiflash/issues/1682,
 # The precision of tiflash results is different from that of tidb, which is a compatibility issue
-mysql> use test; set session tidb_isolation_read_engines='tiflash'; select * from t where value = 54/28;
+# mysql> use test; set session tidb_isolation_read_engines='tiflash'; select * from t where value = 54/28;
 mysql> use test; set session tidb_isolation_read_engines='tiflash'; select * from t where value = c1/c2;
 +------+--------+------+------+
 | id   | value  | c1   | c2   |