Error: External Bank Account Already Exists, Travel Voucher

Hello,

Context:

A user has a bank account on two Sites, Traveler and CC Traveler. They're attempting to approve a Travel Voucher with the CC Traveler bank account, but the approver is receiving this error: 'Card already assigned to another site for this Traveler'.

So, I end dated the bank accounts on both Sites then attempted to create the same bank account but only on the CC Traveler Site. However, I am now receiving this error: 'External Bank Account Already Exists'

We have searched for the existing bank account on the front end, but it doesn't exist with any other user (the user's accounts are all end dated). I did a query of the bank account, and it appears to exist in the back end.