diff --git a/app/Http/Controllers/CharacteristicApprovalController.php b/app/Http/Controllers/CharacteristicApprovalController.php
index dfdeb8d..2da4d24 100644
--- a/app/Http/Controllers/CharacteristicApprovalController.php
+++ b/app/Http/Controllers/CharacteristicApprovalController.php
@@ -60,6 +60,12 @@ class CharacteristicApprovalController extends Controller
             }
         }
 
+        $allowedMailStatusByLevel = [
+            1 => 'Sent',
+            2 => 'Sent-Mail2',
+            3 => 'Sent-Mail3',
+        ];
+
         $expectedMailStatus = $allowedMailStatusByLevel[$level] ?? null;
 
         if ($record->mail_status != $expectedMailStatus) {
@@ -110,6 +116,12 @@ class CharacteristicApprovalController extends Controller
             }
         }
 
+        $allowedMailStatusByLevel = [
+            1 => 'Sent',
+            2 => 'Sent-Mail2',
+            3 => 'Sent-Mail3',
+        ];
+
         $expectedMailStatus = $allowedMailStatusByLevel[$level] ?? null;
 
         if ($record->mail_status != $expectedMailStatus) {