fix

lib/orm/nulltable.php

@@ -40,13 +40,12 @@ class NullTable extends ADataManager
                 'title' => 'Id',
             ]),
             'CREATED_AT' => new \Bitrix\Main\Entity\DatetimeField('CREATED_AT', [
-                'default_value' => new \Bitrix\Main\Type\DateTime(),
                 'title' => 'CreatedAt',
-                'in_form' => false,
+                'user_edit' => false,
             ]),
             'UPDATED_AT' => new \Bitrix\Main\Entity\DatetimeField('UPDATED_AT', [
                 'title' => 'UpdatedAt',
-                'in_form' => false,
+                'user_edit' => false,
             ]),
         );
     }
@@ -58,7 +57,7 @@ class NullTable extends ADataManager
      * @return \Bitrix\Main\ORM\Data\UpdateResult
      * @throws \Bitrix\Main\ObjectException
      */
-    public static function update($id, $fields)
+    public static function update($id, array $fields)
     {
         foreach (static::getEntity()->getFields() as $field){
             if(is_a($field, DatetimeField::class)){
@@ -71,6 +70,7 @@ class NullTable extends ADataManager
         $fields = array_merge($fields, [
             'UPDATED_AT' => new \Bitrix\Main\Type\DateTime(), // date(CDatabase::DateFormatToPHP(FORMAT_DATETIME))
         ]);
+        unset($fields['CREATED_AT']);
 
         $result = parent::update($id, $fields);
         return $result;
@@ -81,7 +81,7 @@ class NullTable extends ADataManager
      * @return \Bitrix\Main\ORM\Data\AddResult
      * @throws \Bitrix\Main\ObjectException
      */
-    public static function add($fields)
+    public static function add(array $fields)
     {
         $fields = array_merge($fields, [
             'CREATED_AT' => new \Bitrix\Main\Type\DateTime(),