Spelling mistake in itr 4s

There was spelling mistake in first name & last name of the assesee while filing ITR- 4S on 12/03/2017 and ITR acknowledgement certificate was generated.  My question is that how do I rectify the error.  Should I send this erroneous ITR to Bangalore CPC or should I file a revised return & send the revised return to Bangalore CPC instead of sending original return. Kindly guide me.