db-schema/db_scripts/diff/15070.up

USE billing;
update email_templates set subject = 'Invoice #[%invoice.serial%] from [%invoice.period_start_obj.ymd%] to [%invoice.period_end_obj.ymd%]',
body = 'Dear Customer,

Please find your invoice #[%invoice.serial%] for [%invoice.period_start_obj.month_name%], [%invoice.period_start_obj.year%] in attachment of this letter.

Your faithful Sipwise system

--
This is an automatically generated message. Do not reply.' 
where name = 'invoice_default_email' and reseller_id is null;