Invoice Cancellation / Deletion on the same moth before filing GST 1R or GST 3B

Hariny Vedha (2 Points)

19 February 2020  

In the month of Feb, an invoice #8 is created by mistake, but it is not issued to the client. Also, next invoices #9 & #10 are created and sale is completed.

GST 1R  & GST3B is not filed yet. How to delete or cancel the invoice #8. Is it mandatory to create a credit note or can i just delete it as such?