diff --git a/_incl_data/class/User.php b/_incl_data/class/User.php
index 4456f6bf..ca6a472d 100644
--- a/_incl_data/class/User.php
+++ b/_incl_data/class/User.php
@@ -3985,6 +3985,9 @@ class User
                         'SELECT `id`,`items_id`,`data` FROM `items_main_data` WHERE `items_id` = "' . $pl['id'] . '" LIMIT 1'
                     )
                 );
+                if (empty($d['data'])) {
+                    $d['data'] = '';
+                }
                 $po = ConversionHelper::dataStringToArray($d['data']);
 
                 if ($sid == 609) {