Money marked as received twice to Invoice - how to reverse

I accidentally marked payment as received to a customer invoice twice. It is now showing as paid twice or overpaid. I can’t workout where to reverse the 2nd payment. Help please?

The customer has NOT paid twice; it was my error on Manager.

Just delete the duplicate transaction. If you have received money in bank account, go to Bank accounts tab to find that duplicate transaction.

Done! Thanks so much for the quick response.