Fix: Correct corrupted data

mysql/migration/2.4.0-2.5.0.sql

@@ -78,3 +78,6 @@ alter table llx_don add import_key      varchar(14);
 update llx_const set visible = 1, name = 'FACTURE_ENABLE_RECUR', value='1' where name = 'FACTURE_DISABLE_RECUR' and value = '0';
 delete from llx_const where name = 'FACTURE_DISABLE_RECUR' and value = '1';
 
+
+update llx_bank_account set ref = label where ref is null or ref = '';
+