diff --git a/mysql/migration/2.0.0-2.1.0.sql b/mysql/migration/2.0.0-2.1.0.sql
index 00ffae49d54..2bbf2cb02e8 100644
--- a/mysql/migration/2.0.0-2.1.0.sql
+++ b/mysql/migration/2.0.0-2.1.0.sql
@@ -224,6 +224,7 @@ create table llx_livraison
   fk_adresse_livraison  integer,
 
   UNIQUE INDEX (ref)
+  key(fk_commande)
 )type=innodb;
 
 alter table llx_livraison drop column fk_soc;
diff --git a/mysql/tables/llx_livraison.key.sql b/mysql/tables/llx_livraison.key.sql
deleted file mode 100644
index a4988ec33a0..00000000000
--- a/mysql/tables/llx_livraison.key.sql
+++ /dev/null
@@ -1,28 +0,0 @@
--- ============================================================================
--- Copyright (C) 2006 Laurent Destailleur  <eldy@users.sourceforge.net>
---
--- This program is free software; you can redistribute it and/or modify
--- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation; either version 2 of the License, or
--- (at your option) any later version.
---
--- This program is distributed in the hope that it will be useful,
--- but WITHOUT ANY WARRANTY; without even the implied warranty of
--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
--- GNU General Public License for more details.
---
--- You should have received a copy of the GNU General Public License
--- along with this program; if not, write to the Free Software
--- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
---
--- $Id$
--- $Source$
---
--- ============================================================================
-
-
--- Supprimme orphelins pour permettre montée de la clé
--- V4 DELETE llx_livraison FROM llx_livraison LEFT JOIN llx_societe ON llx_livraison.fk_soc = llx_societe.idp WHERE llx_societe.idp IS NULL; 
-
-ALTER TABLE llx_livraison ADD INDEX idx_livraison_fk_soc (fk_soc);
-ALTER TABLE llx_livraison ADD CONSTRAINT fk_livraison_societe FOREIGN KEY (fk_soc) REFERENCES llx_societe (idp);
diff --git a/mysql/tables/llx_livraison.sql b/mysql/tables/llx_livraison.sql
index 900306f680a..cdc34a6a664 100644
--- a/mysql/tables/llx_livraison.sql
+++ b/mysql/tables/llx_livraison.sql
@@ -41,4 +41,5 @@ create table llx_livraison
   fk_adresse_livraison  integer,                       -- adresse de livraison
 
   UNIQUE INDEX (ref)
+  key(fk_commande)
 )type=innodb;