diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php b/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
index f69a52b..01bc434 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
@@ -279,7 +279,7 @@ public function preSave(EntityStorageControllerInterface $storage_controller) {
     }
 
     if (!$this->isNew()) {
-      $original = $storage_controller->loadUnchanged($this->id());
+      $original = $storage_controller->loadUnchanged($this->getOriginalId());
       // Ensure that the UUID cannot be changed for an existing entity.
       if ($original && ($original->uuid() != $this->uuid())) {
         throw new ConfigDuplicateUUIDException(String::format('Attempt to save a configuration entity %id with UUID %uuid when this entity already exists with UUID %original_uuid', array('%id' => $this->id(), '%uuid' => $this->uuid(), '%original_uuid' => $original->uuid())));