diff --git a/install-dev/data/db_structure.sql b/install-dev/data/db_structure.sql
index 160e2f60c7ca6..58cf6a009f411 100644
--- a/install-dev/data/db_structure.sql
+++ b/install-dev/data/db_structure.sql
@@ -6,7 +6,7 @@ SET
 CREATE TABLE `PREFIX_accessory` (
   `id_product_1` int(10) unsigned NOT NULL,
   `id_product_2` int(10) unsigned NOT NULL,
-  KEY `accessory_product` (`id_product_1`, `id_product_2`)
+  PRIMARY KEY `accessory_product` (`id_product_1`, `id_product_2`)
 ) ENGINE=ENGINE_TYPE DEFAULT CHARSET=utf8mb4 COLLATION;
 
 /* Address info associated with a user */