diff --git a/Models/TaskMapper.php b/Models/TaskMapper.php
index 4fe84d1..5fd5cb8 100644
--- a/Models/TaskMapper.php
+++ b/Models/TaskMapper.php
@@ -130,6 +130,11 @@ class TaskMapper extends DataMapperAbstract
     {
         try {
             $objId = parent::create($obj, $relations);
+
+            if($objId === null || !is_scalar($objId)) {
+                return $objId;
+            }
+
             $query = new Builder(self::$db);
 
             $query->prefix(self::$db->getPrefix())