Invoice No duplicated

shankar (chennai) (130 Points)

17 April 2019  
Dear Experts,

I've raised invoice for a party for the month of March 2019 and party paid against such invoice. However such invoice is not saved in tally.

so raised invoice for another party with the same invoice no which I didn't notice properly.

I've filed GSTR 1 for the month of March 2019.

How can I rectify this?

Thank you!