diff --git a/src/PersistentData/PersistentDataManager.php b/src/PersistentData/PersistentDataManager.php
index 9bed8dc..e08ef7b 100644
--- a/src/PersistentData/PersistentDataManager.php
+++ b/src/PersistentData/PersistentDataManager.php
@@ -133,7 +133,7 @@ class PersistentDataManager
 
             if (count($modified) > 0) {
                 $modify->setId($id);
-                $modify->setDiff($original);
+                $modify->setDiff($diff);
                 $modify->fill($modified);
                 $modify->save();
             }