diff --git a/htdocs/install/mysql/tables/llx_ticket.key.sql b/htdocs/install/mysql/tables/llx_ticket.key.sql
index 28bf2a88188..d4805d8a788 100644
--- a/htdocs/install/mysql/tables/llx_ticket.key.sql
+++ b/htdocs/install/mysql/tables/llx_ticket.key.sql
@@ -15,10 +15,9 @@
 -- along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 ALTER TABLE llx_ticket ADD UNIQUE uk_ticket_track_id (track_id);
-ALTER TABLE `llx_ticket` ADD UNIQUE `uk_ticket_ref` (`ref`);
-ALTER TABLE `llx_ticket` ADD INDEX idx_ticket_entity (`entity`);
-ALTER TABLE `llx_ticket` ADD INDEX idx_ticket_fk_soc (`fk_soc`);
-ALTER TABLE `llx_ticket` ADD INDEX idx_ticket_fk_user_assign (`fk_user_assign`);
-ALTER TABLE `llx_ticket` ADD INDEX idx_ticket_fk_project (`fk_project`);
-ALTER TABLE `llx_ticket` ADD INDEX idx_ticket_fk_statut (`fk_statut`);
-
+ALTER TABLE llx_ticket ADD UNIQUE uk_ticket_ref (ref, entity);
+ALTER TABLE llx_ticket ADD INDEX idx_ticket_entity (entity);
+ALTER TABLE llx_ticket ADD INDEX idx_ticket_fk_soc (fk_soc);
+ALTER TABLE llx_ticket ADD INDEX idx_ticket_fk_user_assign (fk_user_assign);
+ALTER TABLE llx_ticket ADD INDEX idx_ticket_fk_project (fk_project);
+ALTER TABLE llx_ticket ADD INDEX idx_ticket_fk_statut (fk_statut);