diff --git a/app/api/logic/GroupBuyLogic.php b/app/api/logic/GroupBuyLogic.php
index 1743f27c..4de1b8fd 100644
--- a/app/api/logic/GroupBuyLogic.php
+++ b/app/api/logic/GroupBuyLogic.php
@@ -54,9 +54,10 @@ class GroupBuyLogic extends Logic
                     $v['value'] = strtotime($v['value']);
                 }
 
-                if ($v['name'] == 'service') {
+                if ($v['name'] == 'service' && $v['value']) {
                     $v['value'] = explode(',', $v['value']);
                 }
+
                 $config[$v['name']] = $v['value'];
             }
         }