diff --git a/mysql/migration/2.6.0-2.7.0.sql b/mysql/migration/2.6.0-2.7.0.sql
index 4360d7595ca..df10a7204da 100644
--- a/mysql/migration/2.6.0-2.7.0.sql
+++ b/mysql/migration/2.6.0-2.7.0.sql
@@ -10,11 +10,13 @@
 -- so we made first change to remove it
 alter table llx_menu_const drop foreign key fk_menu_const_fk_menu;
 
+ALTER TABLE llx_adherent ADD UNIQUE INDEX uk_adherent_fk_soc (fk_soc);
+
 update llx_menu_constraint set action = '$conf->societe->enabled' where action = '$conf->commercial->enabled';
 
 -- Clean no more required parameters
 delete from llx_const where name = 'MAIN_MODULE_COMMERCIAL';
-delete from llx_const where name like 'MAIN_MODULE_%_DIR_OUTPUT' AND name <> 'MAIN_MODULE_SYSLOG_OUTPUT';
+delete from llx_const where name like 'MAIN_MODULE_%_DIR_OUTPUT';
 delete from llx_const where name like 'MAIN_MODULE_%_DIR_TEMP';
 
 alter table llx_societe add column import_key varchar(14);