How to resend same newsletter from Simplenews? I'm using simplenews module in Drupal 7. Also I have working mailing system as well as Cron system. I want to resend the newsletter that has been sent previously. I don't want to edit the database every time for resending. I want to send newsletter using user interface itself.

I tried editing simplenews.module and simplenews.admin.inc files.

I edited simplenews.module 

/**
* NEWSLETTER SENT STATUS
*/
define('SIMPLENEWS_STATUS_SEND_NOT', 0);
define('SIMPLENEWS_STATUS_SEND_PENDING', 1);
define('SIMPLENEWS_STATUS_SEND_READY', 0);
define('SIMPLENEWS_STATUS_SEND_PUBLISH', 3);


But as I edited for SIMPLENEWS_STATUS_SEND_READY, it started giving me notice in the admin panel stating:


  Notice: Undefined offset: 2 theme_simplenews_status() (/home/#####/public_html/#######/sites/all/modules/simplenews/includes/simplenews.admin.inc file row number　1776 ).


But I couldn't edit simplenews.admin.inc file. And in the newsletter sending option it shows following message but don't send message when I run Cron:


  This newsletter is pending 


Please help if someone has faced the same issue.
Perhaps easier to clone and then resend the newsletter node with the node_clone module.

The clone module allows users to make a copy of an existing item of site content (a node) and then edit that copy.