diff --git a/mysql/migration/1.1.0-2.0.0.sql b/mysql/migration/1.1.0-2.0.0.sql
index e5e075d1ccc..c0f0f185df7 100644
--- a/mysql/migration/1.1.0-2.0.0.sql
+++ b/mysql/migration/1.1.0-2.0.0.sql
@@ -488,7 +488,8 @@ update llx_bank set datev=dateo where datev is null;
 
 update llx_chargesociales set periode=date_ech where periode is null or periode = '0000-00-00';
 
-
+-- pour virer les doublons de llx_bank_url (dus à un ancien bug)
+ALTER IGNORE TABLE llx_bank_url ADD UNIQUE INDEX(fk_bank,url_id);
 
 create table llx_societe_remise
 (