diff --git a/dbms/src/Storages/Transaction/RegionPersister.cpp b/dbms/src/Storages/Transaction/RegionPersister.cpp
index ee4056dc297..03312791050 100644
--- a/dbms/src/Storages/Transaction/RegionPersister.cpp
+++ b/dbms/src/Storages/Transaction/RegionPersister.cpp
@@ -106,8 +106,6 @@ void RegionPersister::doPersist(RegionCacheWriteElement & region_write_buffer, c
 {
     auto & [region_id, buffer, region_size, applied_index] = region_write_buffer;
 
-    std::lock_guard lock(mutex);
-
     if (page_reader)
     {
         auto entry = page_reader->getPageEntry(region_id);
diff --git a/dbms/src/Storages/Transaction/RegionPersister.h b/dbms/src/Storages/Transaction/RegionPersister.h
index 7cdd36e8e3a..2cb9c7d54d8 100644
--- a/dbms/src/Storages/Transaction/RegionPersister.h
+++ b/dbms/src/Storages/Transaction/RegionPersister.h
@@ -81,7 +81,6 @@ class RegionPersister final : private boost::noncopyable
 
     NamespaceId ns_id = KVSTORE_NAMESPACE_ID;
     const RegionManager & region_manager;
-    std::mutex mutex;
     LoggerPtr log;
 };
 } // namespace DB