CVI grouping Customizing for direction BP to customer is not unique

What causes this issue?

The customer account group &v1& is assigned to several business partner
groupings in the <ZK>Customer/Vendor Integration (CVI)</> Customizing.

System Response

The harmonization report MDG_BS_CUST_HARM issues an error.
The Customer UI requires a unique assignment of the customer account
group to a business partner grouping. Otherwise the system cannot
determine the correct business partner grouping to be used.

How to fix this error?

Check and correct your CVI Customizing under <ZK>SAP Customizing
Implementation Guide</> -> <ZK>Cross-Application Components</> ->
<ZK>Master Data Synchronization</> -> <ZK>Customer/Vendor Integration</>
-> <ZK>Business Partner Settings</> -> <ZK>Settings for Customer
Integration</> -> <ZK>Field Assignment for Customer Integration</> ->
<ZK>Assign Keys</> ->
<DS:SIMG.V_TBD001>Define Number Assignment for Direction BP to Customer
</>.

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.