diff --git a/core/modules/aggregator/lib/Drupal/aggregator/ItemStorageController.php b/core/modules/aggregator/lib/Drupal/aggregator/ItemStorageController.php
index 070fbf0..016e8ae 100644
--- a/core/modules/aggregator/lib/Drupal/aggregator/ItemStorageController.php
+++ b/core/modules/aggregator/lib/Drupal/aggregator/ItemStorageController.php
@@ -20,18 +20,6 @@
 class ItemStorageController extends DatabaseStorageControllerNG implements ItemStorageControllerInterface {
 
   /**
-   * Overrides Drupal\Core\Entity\DataBaseStorageController::create().
-   */
-  public function create(array $values) {
-    $entity = parent::create($values);
-
-    if (!isset($entity->timestamp->value)) {
-      $entity->timestamp->value = REQUEST_TIME;
-    }
-    return $entity;
-  }
-
-  /**
    * Overrides Drupal\Core\Entity\DataBaseStorageController::attachLoad().
    */
   protected function attachLoad(&$queried_entities, $load_revision = FALSE) {
diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/Core/Entity/Item.php b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/Core/Entity/Item.php
index b527752..6da20f3 100644
--- a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/Core/Entity/Item.php
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/Core/Entity/Item.php
@@ -136,7 +136,9 @@ public function label($langcode = NULL) {
    * {@inheritdoc}
    */
   public function postCreate(EntityStorageControllerInterface $storage_controller) {
-    $this->timestamp->value = REQUEST_TIME;
+    if (!isset($this->timestamp->value)) {
+      $this->timestamp->value = REQUEST_TIME;
+    }
   }
 
   /**