diff --git a/htdocs/install/mysql/migration/2.6.0-2.7.0.sql b/htdocs/install/mysql/migration/2.6.0-2.7.0.sql
index ab81825b80c..837fc16ba63 100644
--- a/htdocs/install/mysql/migration/2.6.0-2.7.0.sql
+++ b/htdocs/install/mysql/migration/2.6.0-2.7.0.sql
@@ -467,3 +467,6 @@ ALTER TABLE llx_c_methode_commande_fournisseur ADD UNIQUE INDEX uk_c_methode_com
 
 ALTER TABLE llx_menu change user usertype      integer NOT NULL default '0';
 
+-- Rename index
+ALTER TABLE llx_adherent_options DROP INDEX uk_adherent_options;
+ALTER TABLE llx_adherent_options ADD INDEX idx_adherent_options (adhid);
diff --git a/htdocs/install/mysql/tables/llx_adherent_options.key.sql b/htdocs/install/mysql/tables/llx_adherent_options.key.sql
index 4a6d53f597f..c8522d21bd7 100644
--- a/htdocs/install/mysql/tables/llx_adherent_options.key.sql
+++ b/htdocs/install/mysql/tables/llx_adherent_options.key.sql
@@ -19,4 +19,4 @@
 -- $Id$
 -- ===================================================================
 
-ALTER TABLE llx_adherent_options ADD INDEX uk_adherent_options (adhid);
+ALTER TABLE llx_adherent_options ADD INDEX idx_adherent_options (adhid);