diff --git a/htdocs/install/mysql/migration/12.0.0-13.0.0.sql b/htdocs/install/mysql/migration/12.0.0-13.0.0.sql
index a73ca40d86f..9957e23e012 100644
--- a/htdocs/install/mysql/migration/12.0.0-13.0.0.sql
+++ b/htdocs/install/mysql/migration/12.0.0-13.0.0.sql
@@ -456,9 +456,12 @@ ALTER TABLE llx_delivery ADD CONSTRAINT fk_delivery_fk_soc			FOREIGN KEY (fk_soc
 ALTER TABLE llx_delivery ADD CONSTRAINT fk_delivery_fk_user_author	FOREIGN KEY (fk_user_author)	REFERENCES llx_user (rowid);
 ALTER TABLE llx_delivery ADD CONSTRAINT fk_delivery_fk_user_valid	FOREIGN KEY (fk_user_valid)	REFERENCES llx_user (rowid);
 
-ALTER TABLE llx_deliverydet CHANGE COLUMN fk_livraison fk_delivery integer; 
+ALTER TABLE llx_deliverydet DROP CONSTRAINT fk_livraisondet_fk_livraison;
+ALTER TABLE llx_deliverydet DROP INDEX idx_livraisondet_fk_expedition;
+ALTER TABLE llx_deliverydet CHANGE COLUMN fk_livraison fk_delivery integer;
+ALTER TABLE llx_deliverydet ADD INDEX idx_deliverydet_fk_delivery (fk_delivery);
+ALTER TABLE llx_deliverydet ADD CONSTRAINT fk_deliverydet_fk_delivery FOREIGN KEY (fk_delivery) REFERENCES llx_delivery (rowid);
 
--- update llx_extrafields
 UPDATE llx_extrafields SET elementtype = 'delivery' WHERE elementtype = 'livraison';
 UPDATE llx_extrafields SET elementtype = 'deliverydet' WHERE elementtype = 'livraisondet';
 
diff --git a/htdocs/install/mysql/tables/llx_deliverydet.key.sql b/htdocs/install/mysql/tables/llx_deliverydet.key.sql
index 67ad3c37615..ce302383f4b 100644
--- a/htdocs/install/mysql/tables/llx_deliverydet.key.sql
+++ b/htdocs/install/mysql/tables/llx_deliverydet.key.sql
@@ -18,5 +18,5 @@
 -- ===================================================================
 
 
-ALTER TABLE llx_deliverydet ADD INDEX idx_deliverydet_fk_expedition (fk_delivery);
+ALTER TABLE llx_deliverydet ADD INDEX idx_deliverydet_fk_delivery (fk_delivery);
 ALTER TABLE llx_deliverydet ADD CONSTRAINT fk_deliverydet_fk_delivery FOREIGN KEY (fk_delivery) REFERENCES llx_delivery (rowid);