diff --git a/modules/ad_entity_adtech_v2/src/Plugin/ad_entity/AdType/AdtechType.php b/modules/ad_entity_adtech_v2/src/Plugin/ad_entity/AdType/AdtechType.php
index 9e46968..6909782 100644
--- a/modules/ad_entity_adtech_v2/src/Plugin/ad_entity/AdType/AdtechType.php
+++ b/modules/ad_entity_adtech_v2/src/Plugin/ad_entity/AdType/AdtechType.php
@@ -456,7 +456,8 @@ class AdtechType extends AdTypeBase {
     if ($config = $this->configFactory->get('ad_entity.settings')) {
       if ($global_settings = $config->get('adtech_v2_factory')) {
         if ($custom_slot = $global_settings['custom_slot']) {
-          $all_slots = array_column($custom_slot['slots'], 'name') ?? array_column($custom_slot, 'name');
+          $custom_slot = $custom_slot['slots'] ?? $custom_slot;
+          $all_slots = array_column($custom_slot, 'name');
           foreach ($all_slots as $slot) {
             $machine_name                     = str_replace(' ', '_', $slot);
             $slots[strtolower($machine_name)] = $this->stringTranslation->translate($slot);