Merged Supplier with duplicate invoice numbers remains in the Supplier Merge form R12.1.3

In R12.1.3 we submitted a Supplier Merge and the Supplier Merge Report reveals 2 duplicate invoices that cannot be merged. The invoice numbers cannot be changed as the invoices are paid. The "From" Supplier was automatically inactivated as expected.

The problem is that the attempted merge is still stuck in the "Merge Suppliers" form. How do I remove this merge? I do not want to continute to try and merge the suppliers, as there is nothing we can do to change the invoice numbers. To me, the merge is complete. But now, every time we merge new suppliers, this merge will be attempted again. Over time, this will become a problem if we have multiple merges "stuck" in this from due to duplicate invoice numbers.