The way the active_id(s) were retrieved made the wizard only take care of one active_id. This prevented from reverse multiple invoices at the same time. closes odoo/odoo#38537 Fixes: #35759 X-original-commit: fe47011c3fdcec0bda5334f10679e853fe41e45a Signed-off-by: Quentin De Paoli (qdp) <qdp@openerp.com>