diff --git a/mysql/migration/2.6.0-2.7.0.sql b/mysql/migration/2.6.0-2.7.0.sql
index 6d58f71b015..0d56c66d893 100644
--- a/mysql/migration/2.6.0-2.7.0.sql
+++ b/mysql/migration/2.6.0-2.7.0.sql
@@ -57,6 +57,7 @@ ALTER TABLE llx_c_barcode_type ADD COLUMN entity integer DEFAULT 1 NOT NULL AFTE
 ALTER TABLE llx_dolibarr_modules ADD COLUMN entity integer DEFAULT 1 NOT NULL AFTER numero;
 ALTER TABLE llx_bank_categ ADD COLUMN entity integer DEFAULT 1 NOT NULL AFTER label;
 ALTER TABLE llx_bordereau_cheque ADD COLUMN entity integer DEFAULT 1 NOT NULL AFTER number;
+ALTER TABLE llx_prelevement_bons ADD COLUMN entity integer DEFAULT 1 NOT NULL AFTER ref;
 
 ALTER TABLE llx_rights_def DROP PRIMARY KEY;
 ALTER TABLE llx_user_param DROP INDEX fk_user;
@@ -80,6 +81,7 @@ ALTER TABLE llx_livraison DROP INDEX idx_expedition_uk_ref;
 ALTER TABLE llx_livraison DROP INDEX idx_livraison_uk_ref;
 ALTER TABLE llx_fichinter DROP INDEX ref;
 ALTER TABLE llx_dolibarr_modules DROP PRIMARY KEY;
+ALTER TABLE llx_prelevement_bons DROP INDEX ref;
 
 ALTER TABLE llx_rights_def ADD PRIMARY KEY (id, entity);
 ALTER TABLE llx_user_param ADD UNIQUE INDEX uk_user_param (fk_user,param,entity);
@@ -105,6 +107,7 @@ ALTER TABLE llx_fichinter ADD UNIQUE INDEX uk_fichinter_ref (ref, entity);
 ALTER TABLE llx_contrat ADD UNIQUE INDEX uk_contrat_ref (ref, entity);
 ALTER TABLE llx_dolibarr_modules ADD PRIMARY KEY pk_dolibarr_modules (numero, entity);
 ALTER TABLE llx_bordereau_cheque ADD UNIQUE INDEX uk_bordereau_cheque (number, entity);
+ALTER TABLE llx_prelevement_bons ADD UNIQUE INDEX uk_prelevement_bons_ref (ref, entity);
 
 UPDATE llx_const SET entity=0 WHERE name='MAIN_MODULE_USER' AND entity=1;
 UPDATE llx_const SET entity=0 WHERE name='MAIN_POPUP_CALENDAR' AND entity=1;
diff --git a/mysql/tables/llx_prelevement_bons.key.sql b/mysql/tables/llx_prelevement_bons.key.sql
new file mode 100644
index 00000000000..8bb011f7280
--- /dev/null
+++ b/mysql/tables/llx_prelevement_bons.key.sql
@@ -0,0 +1,23 @@
+-- ============================================================================
+-- Copyright (C) 2009 Regis Houssin        <regis@dolibarr.fr>
+--
+-- 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.
+--
+-- $Id$
+-- ============================================================================
+
+
+ALTER TABLE llx_prelevement_bons ADD UNIQUE INDEX uk_prelevement_bons_ref (ref, entity);
+
diff --git a/mysql/tables/llx_prelevement_bons.sql b/mysql/tables/llx_prelevement_bons.sql
index f66c5068e51..7e626be7349 100644
--- a/mysql/tables/llx_prelevement_bons.sql
+++ b/mysql/tables/llx_prelevement_bons.sql
@@ -1,5 +1,6 @@
 -- ===================================================================
--- Copyright (C) 2005 Rodolphe Quiedeville <rodolphe@quiedeville.org>
+-- Copyright (C) 2005      Rodolphe Quiedeville <rodolphe@quiedeville.org>
+-- Copyright (C) 2005-2009 Regis Houssin        <regis@dolibarr.fr>
 --
 -- 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
@@ -28,6 +29,7 @@ create table llx_prelevement_bons
 (
   rowid          integer AUTO_INCREMENT PRIMARY KEY,
   ref            varchar(12),        -- reference
+  entity         integer DEFAULT 1 NOT NULL, -- multi company id
   datec          datetime,           -- date de creation
   amount         real DEFAULT 0,     -- montant total du prélèvement
   statut         smallint DEFAULT 0, -- statut
@@ -37,7 +39,6 @@ create table llx_prelevement_bons
   method_trans   smallint,           -- méthode de transmission
   fk_user_trans  integer,            -- user qui a effectué la transmission
   date_credit    datetime,           -- date de crédit sur le compte
-  fk_user_credit integer,            -- user qui a remonté l'info de crédit
-  
-  UNIQUE(ref)
+  fk_user_credit integer             -- user qui a remonté l'info de crédit
+
 )type=innodb;