diff --git a/br/pkg/lightning/backend/tidb/tidb.go b/br/pkg/lightning/backend/tidb/tidb.go
index c748da0c76625..1b38e0054ac82 100644
--- a/br/pkg/lightning/backend/tidb/tidb.go
+++ b/br/pkg/lightning/backend/tidb/tidb.go
@@ -712,7 +712,7 @@ func (w *Writer) IsSynced() bool {
 
 type TableAutoIDInfo struct {
 	Column string
-	NextID int64
+	NextID uint64
 	Type   string
 }
 
@@ -725,7 +725,7 @@ func FetchTableAutoIDInfos(ctx context.Context, exec utils.QueryExecutor, tableN
 	for rows.Next() {
 		var (
 			dbName, tblName, columnName, idType string
-			nextID                              int64
+			nextID                              uint64
 		)
 		columns, err := rows.Columns()
 		if err != nil {
@@ -738,7 +738,7 @@ func FetchTableAutoIDInfos(ctx context.Context, exec utils.QueryExecutor, tableN
 		//| testsysbench | t          | _tidb_rowid |                  1 | AUTO_INCREMENT |
 		//+--------------+------------+-------------+--------------------+----------------+
 
-		// if columns length is 4, it doesn't contains the last column `ID_TYPE`, and it will always be 'AUTO_INCREMENT'
+		// if columns length is 4, it doesn't contain the last column `ID_TYPE`, and it will always be 'AUTO_INCREMENT'
 		// for v4.0.0~v4.0.2 show table t next_row_id only returns 4 columns.
 		if len(columns) == 4 {
 			err = rows.Scan(&dbName, &tblName, &columnName, &nextID)
diff --git a/br/pkg/lightning/backend/tidb/tidb_test.go b/br/pkg/lightning/backend/tidb/tidb_test.go
index 3a824063ccaed..aada4b24f91ed 100644
--- a/br/pkg/lightning/backend/tidb/tidb_test.go
+++ b/br/pkg/lightning/backend/tidb/tidb_test.go
@@ -295,7 +295,7 @@ func (s *mysqlSuite) TestFetchRemoteTableModels_4_0(c *C) {
 			AddRow("t", "id", "bigint(20) unsigned", "", "auto_increment"))
 	s.mockDB.ExpectQuery("SHOW TABLE `test`.`t` NEXT_ROW_ID").
 		WillReturnRows(sqlmock.NewRows([]string{"DB_NAME", "TABLE_NAME", "COLUMN_NAME", "NEXT_GLOBAL_ROW_ID"}).
-			AddRow("test", "t", "id", int64(1)))
+			AddRow("test", "t", "id", "10942694589135710585"))
 	s.mockDB.ExpectCommit()
 
 	bk := tidb.NewTiDBBackend(s.dbHandle, config.ErrorOnDup, errormanager.New(nil, config.NewConfig()))