Ext. numbering f. BP (&1) incompatible with ext. numbering f. cust. (&2)

What causes this issue?

The assignment of BP grouping &v1& to customer account group &v2& is not
supported by the Customer UI.
The BP grouping refers to an external number assignment. The customer
account group refers to an external number assignment. The
<DS:DE.BC_SAMENUMBER>Same Numbers</> flag is not set.
In the Customer UI, you can define the BP number only. The customer
number must be derived by the system. This is only possible if same
numbers are used.

System Response

The ERP Customer UI cannot use these settings.

How to fix this error?

The settings are valid for the Customer UI.
If you only use the ERP Customer UI, you can delete the settings in the
<ZK>Customer/Vendor Integration (CVI) </>Customizing.

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.