diff --git a/htdocs/install/mysql/migration/3.0.0-3.1.0.sql b/htdocs/install/mysql/migration/3.0.0-3.1.0.sql
index ffd39f8d299..0025df5d219 100755
--- a/htdocs/install/mysql/migration/3.0.0-3.1.0.sql
+++ b/htdocs/install/mysql/migration/3.0.0-3.1.0.sql
@@ -402,3 +402,13 @@ ALTER TABLE llx_adherent_options rename to llx_adherent_extrafields;
 drop table llx_extra_fields_options;
 drop table llx_extra_fields_values;
 drop table llx_extra_fields;
+
+ALTER TABLE llx_commande MODIFY ref_int varchar(50);
+ALTER TABLE llx_commande MODIFY ref_ext varchar(50);
+ALTER TABLE llx_commande MODIFY ref_client varchar(50);
+ALTER TABLE llx_facture MODIFY ref_int varchar(50);
+ALTER TABLE llx_facture MODIFY ref_ext varchar(50);
+ALTER TABLE llx_facture MODIFY ref_client varchar(50);
+ALTER TABLE llx_propal MODIFY ref_ext varchar(50);
+ALTER TABLE llx_propal MODIFY ref_client varchar(50);
+ALTER TABLE llx_propal ADD COLUMN ref_int varchar(50) AFTER ref_ext;
diff --git a/htdocs/install/mysql/tables/llx_advanced_extrafields.key.sql b/htdocs/install/mysql/tables/llx_advanced_extrafields.key.sql
index 3c2a6257b38..d23a1367f92 100755
--- a/htdocs/install/mysql/tables/llx_advanced_extrafields.key.sql
+++ b/htdocs/install/mysql/tables/llx_advanced_extrafields.key.sql
@@ -19,4 +19,4 @@
 -- ============================================================================
 
 
-ALTER TABLE llx_advanced_extrafields ADD UNIQUE INDEX idx_advanced_extrafields_name (object, entity, name);
+ALTER TABLE llx_advanced_extrafields ADD UNIQUE INDEX idx_advanced_extrafields_name (elementtype, entity, name);
diff --git a/htdocs/install/mysql/tables/llx_commande.sql b/htdocs/install/mysql/tables/llx_commande.sql
index 9708c47e082..cb38ff6bc8d 100644
--- a/htdocs/install/mysql/tables/llx_commande.sql
+++ b/htdocs/install/mysql/tables/llx_commande.sql
@@ -26,9 +26,9 @@ create table llx_commande
   ref                   varchar(30)       NOT NULL,    -- order reference number
   entity                integer DEFAULT 1 NOT NULL,	   -- multi company id
 
-  ref_ext               varchar(30),                   -- reference into an external system (not used by dolibarr)
-  ref_int				varchar(30),                   -- reference into an internal system (used by dolibarr)
-  ref_client            varchar(30),                   -- reference for customer
+  ref_ext               varchar(50),                   -- reference into an external system (not used by dolibarr)
+  ref_int				varchar(50),                   -- reference into an internal system (used by dolibarr)
+  ref_client            varchar(50),                   -- reference for customer
 
   fk_soc                integer NOT NULL,
   fk_projet             integer DEFAULT 0,             -- projet auquel est rattache la commande
diff --git a/htdocs/install/mysql/tables/llx_facture.sql b/htdocs/install/mysql/tables/llx_facture.sql
index 1f528841e31..40e131fefdf 100644
--- a/htdocs/install/mysql/tables/llx_facture.sql
+++ b/htdocs/install/mysql/tables/llx_facture.sql
@@ -29,9 +29,9 @@ create table llx_facture
   facnumber           varchar(30)        NOT NULL,  -- invoice reference number
   entity              integer  DEFAULT 1 NOT NULL,	-- multi company id
 
-  ref_ext             varchar(30),                  -- reference into an external system (not used by dolibarr)
-  ref_int			  varchar(30),                  -- reference into an internal system (used by dolibarr)
-  ref_client          varchar(30),                  -- reference for customer
+  ref_ext             varchar(50),                  -- reference into an external system (not used by dolibarr)
+  ref_int			  varchar(50),                  -- reference into an internal system (used by dolibarr)
+  ref_client          varchar(50),                  -- reference for customer
 
   type                smallint DEFAULT 0 NOT NULL,  -- type of invoice
   increment           varchar(10),
diff --git a/htdocs/install/mysql/tables/llx_propal.sql b/htdocs/install/mysql/tables/llx_propal.sql
index 38aefa7d4e7..eaff0a182e1 100644
--- a/htdocs/install/mysql/tables/llx_propal.sql
+++ b/htdocs/install/mysql/tables/llx_propal.sql
@@ -27,8 +27,9 @@ create table llx_propal
   ref             varchar(30) NOT NULL,			-- proposal reference number
   entity          integer DEFAULT 1 NOT NULL,   -- multi company id
 
-  ref_ext         varchar(30),                  -- reference into an external system (not used by dolibarr)
-  ref_client      varchar(30),					-- customer proposal number
+  ref_ext         varchar(50),                  -- reference into an external system (not used by dolibarr)
+  ref_int		  varchar(50),                  -- reference into an internal system (used by dolibarr)
+  ref_client      varchar(50),					-- customer proposal number
 
   fk_soc          integer,
   fk_projet       integer     DEFAULT 0,        -- projet auquel est rattache la propale