diff --git a/Models/Collection.php b/Models/Collection.php
index c21b76e..3e81231 100644
--- a/Models/Collection.php
+++ b/Models/Collection.php
@@ -45,7 +45,7 @@ class Collection extends Media implements \Iterator
      */
     public function __construct()
     {
-        $this->createdAt = new \DateTime();
+        parent::__construct();
     }
 
     /**
diff --git a/Models/MediaMapper.php b/Models/MediaMapper.php
index 1f2b7f7..80ff9fb 100644
--- a/Models/MediaMapper.php
+++ b/Models/MediaMapper.php
@@ -37,7 +37,6 @@ class MediaMapper extends DataMapperAbstract
         'media_file'        => ['name' => 'media_file', 'type' => 'string', 'internal' => 'path'],
         'media_absolute'        => ['name' => 'media_absolute', 'type' => 'bool', 'internal' => 'isAbsolute'],
         'media_extension'   => ['name' => 'media_extension', 'type' => 'string', 'internal' => 'extension'],
-        'media_description' => ['name' => 'media_description', 'type' => 'string', 'internal' => 'description'],
         'media_size'        => ['name' => 'media_size', 'type' => 'int', 'internal' => 'size'],
         'media_created_by'  => ['name' => 'media_created_by', 'type' => 'int', 'internal' => 'createdBy'],
         'media_created_at'  => ['name' => 'media_created_at', 'type' => 'DateTime', 'internal' => 'createdAt'],