Hi Jenny,
Is it possible to share screenshots of FBL1N for the vendor, so that this can be answered quickly.
invoice paid to vendors- status is cleared
reset items which are cleared FBRA- status open item in fbl1n
now you have canceled the MIRO invoice using MR8M. missing part is reverse Accounting document using FB08. no open items to clear at this stage.
after the above steps create new invoice and make a payment.
Thanks,
Sree