diff --git a/htdocs/install/mysql/migration/16.0.0-17.0.0.sql b/htdocs/install/mysql/migration/16.0.0-17.0.0.sql
index 119dda91a2e..efb9ff96dbb 100644
--- a/htdocs/install/mysql/migration/16.0.0-17.0.0.sql
+++ b/htdocs/install/mysql/migration/16.0.0-17.0.0.sql
@@ -211,6 +211,9 @@ ALTER TABLE llx_projet ADD COLUMN location         varchar(255);
 
 ALTER TABLE llx_c_action_trigger MODIFY COLUMN code varchar(128);
 
+ALTER TABLE llx_overwrite_trans DROP INDEX uk_overwrite_trans;
+ALTER TABLE llx_overwrite_trans ADD UNIQUE INDEX uk_overwrite_trans(entity, lang, transkey);
+
 --
 -- List of all managed triggered events (used for trigger agenda automatic events and for notification)
 --
diff --git a/htdocs/install/mysql/tables/llx_overwrite_trans.key.sql b/htdocs/install/mysql/tables/llx_overwrite_trans.key.sql
index 617036e66ee..7dd3156d2e5 100644
--- a/htdocs/install/mysql/tables/llx_overwrite_trans.key.sql
+++ b/htdocs/install/mysql/tables/llx_overwrite_trans.key.sql
@@ -17,5 +17,4 @@
 -- ===========================================================================
 
 
-ALTER TABLE llx_overwrite_trans ADD UNIQUE INDEX uk_overwrite_trans(lang, transkey);
-
+ALTER TABLE llx_overwrite_trans ADD UNIQUE INDEX uk_overwrite_trans(entity, lang, transkey);