diff --git a/htdocs/install/mysql/migration/7.0.0-8.0.0.sql b/htdocs/install/mysql/migration/7.0.0-8.0.0.sql
index 18b6440f45b..44c2854baa0 100644
--- a/htdocs/install/mysql/migration/7.0.0-8.0.0.sql
+++ b/htdocs/install/mysql/migration/7.0.0-8.0.0.sql
@@ -60,7 +60,7 @@ DROP TABLE llx_c_accountancy_category;
 DROP TABLE llx_c_accountingaccount;
 
 -- drop old postgresql unique key
--- VPGSQL8.2 DROP INDEX llx_usergroup_rights_fk_usergroup_fk_id_key;
+-- VPGSQL8.2 ALTER TABLE llx_usergroup_rights DROP CONSTRAINT llx_usergroup_rights_fk_usergroup_fk_id_key;
 
 update llx_propal set fk_statut = 1 where fk_statut = -1;