diff --git a/internal/core/src/query/GroupByOperator.h b/internal/core/src/query/GroupByOperator.h
index 64e112253748c..21162c09bfe9b 100644
--- a/internal/core/src/query/GroupByOperator.h
+++ b/internal/core/src/query/GroupByOperator.h
@@ -133,10 +133,6 @@ PrepareVectorIteratorsFromIndex(const SearchInfo& search_info,
     if (search_info.group_by_field_id_.has_value()) {
         try {
             auto search_conf = search_info.search_params_;
-            if (search_conf.contains(knowhere::indexparam::EF)) {
-                search_conf[knowhere::indexparam::SEED_EF] =
-                    search_conf[knowhere::indexparam::EF];
-            }
             knowhere::expected<
                 std::vector<std::shared_ptr<knowhere::IndexNode::iterator>>>
                 iterators_val =
diff --git a/internal/core/thirdparty/knowhere/CMakeLists.txt b/internal/core/thirdparty/knowhere/CMakeLists.txt
index 0e9132ee50f59..3c5a4b5a9e6fe 100644
--- a/internal/core/thirdparty/knowhere/CMakeLists.txt
+++ b/internal/core/thirdparty/knowhere/CMakeLists.txt
@@ -12,7 +12,7 @@
 #-------------------------------------------------------------------------------
 
 # Update KNOWHERE_VERSION for the first occurrence
-set( KNOWHERE_VERSION v2.3.3 )
+set( KNOWHERE_VERSION v2.3.4 )
 set( GIT_REPOSITORY  "https://github.com/zilliztech/knowhere.git")
 message(STATUS "Knowhere repo: ${GIT_REPOSITORY}")
 message(STATUS "Knowhere version: ${KNOWHERE_VERSION}")