Customer -> BP: You have not assigned a BP role to account group &

What causes this issue?

Before you can synchronize data from the customer to the business
partner, you must assign at least one business partner role to a c
ustomer account group in the view "Define BP Role for Direction Customer
to BP" (CVIV_CUST_TO_BP2).
You must also assign at least one customer account group to a business
partner grouping in the view "Define Number Assignment for Direction
Customer to BP" (CVIV_CUST_TO_BP1).

System Response

You have assigned at least one business partner grouping to a customer
account group. You have not assigned a business partner role to a
customer account group. At present, data cannot be synchronized from the
customer to the business partner.

How to fix this error?

To ensure that data is synchronized, you must assign at least one
business partner role to a customer account group in the Customizing
activity <DS:SIMG.CVIV_CUST_TO_BP2>Define BP Role for Direction Customer
to BP</>.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.