Reverse an accidentally sent invoice

Reverse an accidentally sent invoice

I have a scheduled invoice which was marked as a draft for invoice in 7 months which I accidentally marked a payment against.  The invoiced was marked as sent and paid.  I have deleted the payment from the invoice and associated it with the correct invoice.

I am now in a position where I need to mark the invoice as draft once more otherwise it will be not sent in 7 months.

How can I achieve this?

Thank you in advance.

Sam