CB55.1 Payment

I am trying to enter a patient refund in CB55.1. I recently learned of this option rather than continually creating one-time vendors in my AP vendor master. When I try to add the payment in CB55.1, I am prompted to provide the vendor bank information "Bank ID and Acct require for electronic payments" The issue is that I am using a transaction code of SYS to create a check, not an electronic payment.

My Patient Refund vendor is setup with a Payment Code of SYS (cash payment). Finally, my vendor is setup for separate payments as to not combine all of the patient refunds on a single payment.

Why is Lawson trying to create an electronic payment? How can I get this to process as a "check"?