diff --git a/app/code/Magento/Sales/Model/ResourceModel/Order/Item/Collection.php b/app/code/Magento/Sales/Model/ResourceModel/Order/Item/Collection.php
index 88725250d4fb5..9fa5c8ae13e28 100644
--- a/app/code/Magento/Sales/Model/ResourceModel/Order/Item/Collection.php
+++ b/app/code/Magento/Sales/Model/ResourceModel/Order/Item/Collection.php
@@ -55,6 +55,7 @@ protected function _afterLoad()
          * Assign parent items
          */
         foreach ($this as $item) {
+            $this->_resource->unserializeFields($item);
             if ($item->getParentItemId()) {
                 $item->setParentItem($this->getItemById($item->getParentItemId()));
             }
diff --git a/lib/internal/Magento/Framework/Session/SessionManager.php b/lib/internal/Magento/Framework/Session/SessionManager.php
index aad3fc9fb34e8..e8013b024f438 100644
--- a/lib/internal/Magento/Framework/Session/SessionManager.php
+++ b/lib/internal/Magento/Framework/Session/SessionManager.php
@@ -470,7 +470,7 @@ public function regenerateId()
             return $this;
         }
         if ($this->isSessionExists()) {
-            session_regenerate_id(true);
+            session_regenerate_id(false);
         } else {
             session_start();
         }