diff --git a/application/models/Question.php b/application/models/Question.php
index f61f2552c83..fa5a8e9d945 100644
--- a/application/models/Question.php
+++ b/application/models/Question.php
@@ -108,7 +108,7 @@ public function rules()
         public function getMaxId()
         {
             $maxId = $this->dbConnection->createCommand()
-                    ->select('MAX(' . $this->primaryKey() . ')')
+                    ->select('MAX(qid)')
                     ->from($this->tableName())
                     ->queryScalar();
             return $maxId;