diff --git a/internal/core/src/index/VectorDiskIndex.cpp b/internal/core/src/index/VectorDiskIndex.cpp
index 2821d07c34..a7effd6b6d 100644
--- a/internal/core/src/index/VectorDiskIndex.cpp
+++ b/internal/core/src/index/VectorDiskIndex.cpp
@@ -159,7 +159,11 @@ VectorDiskAnnIndex<T>::Build(const Config& config) {
     }
 
     auto opt_fields = GetValueFromConfig<OptFieldT>(config, VEC_OPT_FIELDS);
-    if (opt_fields.has_value() && index_.IsAdditionalScalarSupported()) {
+    auto is_partition_key_isolation =
+        GetValueFromConfig<bool>(build_config, "partition_key_isolation");
+    if (opt_fields.has_value() &&
+        index_.IsAdditionalScalarSupported(
+            is_partition_key_isolation.value_or(false))) {
         build_config[VEC_OPT_FIELDS_PATH] =
             file_manager_->CacheOptFieldToDisk(opt_fields.value());
         // `partition_key_isolation` is already in the config, so it falls through
diff --git a/internal/core/src/index/VectorMemIndex.cpp b/internal/core/src/index/VectorMemIndex.cpp
index 4c7dc2a560..b8eabf4808 100644
--- a/internal/core/src/index/VectorMemIndex.cpp
+++ b/internal/core/src/index/VectorMemIndex.cpp
@@ -287,8 +287,11 @@ VectorMemIndex<T>::Build(const Config& config) {
 
     auto opt_fields = GetValueFromConfig<OptFieldT>(config, VEC_OPT_FIELDS);
     std::unordered_map<int64_t, std::vector<std::vector<uint32_t>>> scalar_info;
-    if (opt_fields.has_value() && index_.IsAdditionalScalarSupported() &&
-        config.value("partition_key_isolation", false)) {
+    auto is_partition_key_isolation =
+        GetValueFromConfig<bool>(config, "partition_key_isolation");
+    if (opt_fields.has_value() &&
+        index_.IsAdditionalScalarSupported(
+            is_partition_key_isolation.value_or(false))) {
         scalar_info = file_manager_->CacheOptFieldToMemory(opt_fields.value());
     }
 
diff --git a/internal/core/thirdparty/knowhere/CMakeLists.txt b/internal/core/thirdparty/knowhere/CMakeLists.txt
index 89d30e2a36..bda0b43ab4 100644
--- a/internal/core/thirdparty/knowhere/CMakeLists.txt
+++ b/internal/core/thirdparty/knowhere/CMakeLists.txt
@@ -14,7 +14,7 @@
 # Update KNOWHERE_VERSION for the first occurrence
 milvus_add_pkg_config("knowhere")
 set_property(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY INCLUDE_DIRECTORIES "")
-set( KNOWHERE_VERSION 7dc867d3 )
+set( KNOWHERE_VERSION fcd447d )
 set( GIT_REPOSITORY  "https://github.com/zilliztech/knowhere.git")
 message(STATUS "Knowhere repo: ${GIT_REPOSITORY}")
 message(STATUS "Knowhere version: ${KNOWHERE_VERSION}")