Defective return u/s 139(9)

Hi, I have received a Defective Notice issued u/s 139(9) for AY-2013-14 due to non payment of self assessment tax. When I try to fill in Excel Utility for-2013-14 with the updates but the Notice No. field where I am supposed to fill the CPC communication reference Number takes only 23 characters. The CPC Number I have received has 25 characters including obligues. what to do? and whether the filing is original or revised? Please advice.