diff --git a/app/common/Implement/Repository/Mapper/DateTime.php b/app/common/Implement/Repository/Mapper/DateTime.php
index 85ad2f1..bbeb388 100644
--- a/app/common/Implement/Repository/Mapper/DateTime.php
+++ b/app/common/Implement/Repository/Mapper/DateTime.php
@@ -9,7 +9,7 @@ class DateTime extends Mapper
     public function __construct(string $column, ?string $property = null)
     {
         $this->setFunction(function($data) use ($column) {
-            return new DateTimeImmutable($data[$column]);
+            return new DateTimeImmutable($data[$column] ?? '');
         });
         if ($property !== null) {
             $this->setProperty($property);