diff --git a/app/config/collections/platform.php b/app/config/collections/platform.php
index d5e7ff4669..57f0a0ae7b 100644
--- a/app/config/collections/platform.php
+++ b/app/config/collections/platform.php
@@ -1461,13 +1461,6 @@ $platformCollections = [
                 'lengths' => [],
                 'orders' => [Database::ORDER_ASC],
             ],
-            [
-                '$id' => ID::custom('_key_region'),
-                'type' => Database::INDEX_KEY,
-                'attributes' => ['region'],
-                'lengths' => [],
-                'orders' => [Database::ORDER_ASC],
-            ],
             [
                 '$id' => ID::custom('_key_piid_diid_drt'),
                 'type' => Database::INDEX_KEY,