Payment terms & not created.

What causes this issue?

The system could not find <GL:Customizing>Customizing</> entries for
payment terms &V1&.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Check if the Customizing for the payment terms is maintained correctly.
INCLUDE 'NA_CUST_MAINTAIN'

Error message extract from SAP system. Copyright SAP SE.