Deleting Organization Payment Methods

Summary: I am trying to figure out how to delete the a legislative organization payment method so that I can reconfigure it a new one with the correct "Payment Type"

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Currently, I am trying to delete payment methods for countries, but have run into a problem where I can't delete some because a couple of years ago we had a couple of employees add banking details and payment methods into the system. Now when I go to delete payment methods at a legislative level I get the error:

How can I solve this? I want to add a new payment method for employees, but I don't want this one to be an option anymore.