Why traceback mail received from cronjob everyday for backup failure on Red Hat Satellite 5.

Issue

• Why every day an email goes to root for a cronjob. It ends with an error.
  Mail context:

  From root@example.com  Tue Aug 25 05:25:31 2015
  Return-Path: <root@example.com>
  X-Original-To: root
  Delivered-To: root@example.com
  Received: by example.com (Postfix, from userid 0)
         id A2B5D160066; Tue, 25 Aug 2015 05:25:31 -0400 (EDT)
  From: root@example.com (Cron Daemon)
  To: root@example.com
  Subject: Cron <root@example> /usr/local/sbin/satellite_db_backup.bash > /var/log/satellite-db-backup
  pg_dump: dumping contents of table web_user_site_type
  tar: Removing leading `/' from member names
  tar: Removing leading `/' from hard link targets
  tar: /etc/dhcpd.conf: Cannot stat: No such file or directory
  tar: Exiting with failure status due to previous errors