diff --git a/be/src/storage/lake/pk_tablet_writer.h b/be/src/storage/lake/pk_tablet_writer.h
index d7215ed932c5c..8cd3ad6c0ba0e 100644
--- a/be/src/storage/lake/pk_tablet_writer.h
+++ b/be/src/storage/lake/pk_tablet_writer.h
@@ -56,7 +56,6 @@ class HorizontalPkTabletWriter : public HorizontalGeneralTabletWriter {
 private:
     std::unique_ptr<RowsetTxnMetaPB> _rowset_txn_meta;
     std::unique_ptr<RowsMapperBuilder> _rows_mapper_builder;
-    const std::map<std::string, std::string>* _column_to_expr_value = nullptr;
 };
 
 class VerticalPkTabletWriter : public VerticalGeneralTabletWriter {