diff --git a/app/Models/CollectorModel.php b/app/Models/CollectorModel.php
index 5f65462..ac6fd44 100644
--- a/app/Models/CollectorModel.php
+++ b/app/Models/CollectorModel.php
@@ -27,7 +27,7 @@ class CollectorModel extends CommonModel
         parent::__construct();
     }
 
-    public function getLastEntity($uid): CollectorEntity
+    public function getLastEntity($uid): CollectorEntity|null
     {
         return $this
             ->where('trafficinfo_uid', $uid)