'The assignment of the bank account to the supplier or supplier site is missing or invalid'

Summary:

We are trying to import the Supplier Bank Accounts, but for a few records, we are encountering the following error:

"The assignment of the bank account to the supplier or supplier site is missing or invalid."

Content (please ensure you mask any confidential information):

We are trying to import the Supplier Bank Accounts, but for a few records, we are encountering the following error:

"The assignment of the bank account to the supplier or supplier site is missing or invalid."

I already copied the supplier details from the system extract, and I am still getting the same error.

What are the possible reasons for this error during the supplier bank account import? Also, what are the possible workarounds for resolving this issue?