diff --git a/src/Common/ZooKeeper/ZooKeeper.h b/src/Common/ZooKeeper/ZooKeeper.h
index b31dbc8da49..636c9049af0 100644
--- a/src/Common/ZooKeeper/ZooKeeper.h
+++ b/src/Common/ZooKeeper/ZooKeeper.h
@@ -675,7 +675,7 @@ bool hasZooKeeperConfig(const Poco::Util::AbstractConfiguration & config);
 String getZooKeeperConfigName(const Poco::Util::AbstractConfiguration & config);
 
 template <typename Client>
-void addCheckNotExistsRequest(Coordination::Requests requests, const Client & client, const std::string & path)
+void addCheckNotExistsRequest(Coordination::Requests & requests, const Client & client, const std::string & path)
 {
     if (client.getApiVersion() >= DB::KeeperApiVersion::WITH_CHECK_NOT_EXISTS)
     {
diff --git a/src/Coordination/KeeperStorage.cpp b/src/Coordination/KeeperStorage.cpp
index 28cb4fba9c9..a838de07ecb 100644
--- a/src/Coordination/KeeperStorage.cpp
+++ b/src/Coordination/KeeperStorage.cpp
@@ -1457,13 +1457,8 @@ struct KeeperStorageCheckRequestProcessor final : public KeeperStorageRequestPro
 
     bool checkAuth(KeeperStorage & storage, int64_t session_id, bool is_local) const override
     {
-        StringRef path;
-        if (check_not_exists)
-            path = parentPath(zk_request->getPath());
-        else
-            path = zk_request->getPath();
-
-        return storage.checkACL(path, Coordination::ACL::Read, session_id, is_local);
+        auto path = zk_request->getPath();
+        return storage.checkACL(check_not_exists ? parentPath(path) : path, Coordination::ACL::Read, session_id, is_local);
     }
 
     std::vector<KeeperStorage::Delta>
@@ -1744,6 +1739,7 @@ struct KeeperStorageMultiRequestProcessor final : public KeeperStorageRequestPro
                     concrete_requests.push_back(std::make_shared<KeeperStorageSetRequestProcessor>(sub_zk_request));
                     break;
                 case Coordination::OpNum::Check:
+                case Coordination::OpNum::CheckNotExists:
                     check_operation_type(OperationType::Write);
                     concrete_requests.push_back(std::make_shared<KeeperStorageCheckRequestProcessor>(sub_zk_request));
                     break;