Business partner number is set as customer number

What causes this issue?

The <ZK>Same Numbers</> indicator is set for the business partner and
customer. You have not specified a customer number.

System Response

The system sets the business partner number as the customer number.

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.