diff --git a/src/opnsense/mvc/app/controllers/OPNsense/Interfaces/Api/VipSettingsController.php b/src/opnsense/mvc/app/controllers/OPNsense/Interfaces/Api/VipSettingsController.php
index b89053d0c..84ba8edd3 100644
--- a/src/opnsense/mvc/app/controllers/OPNsense/Interfaces/Api/VipSettingsController.php
+++ b/src/opnsense/mvc/app/controllers/OPNsense/Interfaces/Api/VipSettingsController.php
@@ -176,6 +176,7 @@ class VipSettingsController extends ApiMutableModelControllerBase
 
     public function delItemAction($uuid)
     {
+        Config::getInstance()->lock();
         $node = $this->getModel()->getNodeByReference('vip.' . $uuid);
         $validations = $this->getModel()->whereUsed((string)$node->subnet);
         if (!empty($validations)) {