What happens if I mark a partially payed invoice as paid?

Description

I sent a client a due-on-receipt invoice that allowed partial payments and she’s already paid half. However, when she was about to pay the rest, there was no option to pay the remaining amount. Can I just mark the invoice as paid, receive half the money, and send her a new invoice for the remaining balance or is there another solution to this problem? I really hope someone will help me, thank you so much!!