diff --git a/be/src/vec/sink/vtablet_block_convertor.cpp b/be/src/vec/sink/vtablet_block_convertor.cpp
index 18484d6405d973..2466596f784c41 100644
--- a/be/src/vec/sink/vtablet_block_convertor.cpp
+++ b/be/src/vec/sink/vtablet_block_convertor.cpp
@@ -75,6 +75,7 @@ Status OlapTableBlockConvertor::validate_and_convert_block(
     int filtered_rows = 0;
     {
         SCOPED_RAW_TIMER(&_validate_data_ns);
+        _filter_map.clear();
         _filter_map.resize(rows, 0);
         bool stop_processing = false;
         RETURN_IF_ERROR(_validate_data(state, block.get(), rows, filtered_rows, &stop_processing));