diff --git a/webapp/models/Phase3Box.php b/webapp/models/Phase3Box.php
index 08f9f37c..a07f9bff 100644
--- a/webapp/models/Phase3Box.php
+++ b/webapp/models/Phase3Box.php
@@ -148,7 +148,7 @@ class Phase3Box extends BaseModel {
                 )
             );
             if (!$row) {
-                $uniKey = '';
+                $uniKey = 'phase3box_' . $account;
                 SqlHelper::insert(
                     myself()->_getMarketMysql(),
                     't_mint',