diff --git a/db/update16.4.sql b/db/update16.4.sql
index 6bf006bb0e..a7883ef7c2 100644
--- a/db/update16.4.sql
+++ b/db/update16.4.sql
@@ -26,3 +26,5 @@ ALTER TABLE `zt_user` ADD `visions` varchar(20) NOT NULL AFTER `visits`;
 UPDATE `zt_user` SET `visions`='rnd,lite';
 
 ALTER TABLE `zt_productplan` ADD `closedReason` varchar(20) NOT NULL AFTER `order`;
+
+ALTER TABLE `zt_stage` ADD UNIQUE (`type`);