diff --git a/web/init/mastostart_solo_struttura.sql b/web/init/mastostart_solo_struttura.sql
index 8b063f2..568033a 100644
--- a/web/init/mastostart_solo_struttura.sql
+++ b/web/init/mastostart_solo_struttura.sql
@@ -230,7 +230,8 @@ CREATE TABLE `Instances` (
   `GuestID` int(10) unsigned DEFAULT NULL,
   `LastGuestEdit` int(10) unsigned DEFAULT NULL,
   `RPos` int(20) unsigned DEFAULT NULL,
-  PRIMARY KEY (`ID`)
+  PRIMARY KEY (`ID`),
+  KEY `URI` (`URI`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 
@@ -483,4 +484,4 @@ CREATE TABLE `ZStats` (
 /*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
 /*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;
 
--- Dump completed on 2022-12-01 17:43:07
+-- Dump completed on 2022-12-01 19:35:05