Error while processing customer &1; cust. is assigned to a retail site

What causes this issue?

You have started ALE inbound processing of an IDoc for a customer that
is assigned to a retail site.

System Response

The distribution of master data of a customer that is assigned to a
retail site using ALE is not supported. The system stops processing the
IDoc.

How to fix this error?

Data distribution from an SAP ERP system to an SAP S/4HANA system
To distribute the retail site including the assigned customer and
supplier master data, use transaction WBTIMEX.
Data distribution from an SAP S/4HANA system to an SAP S/4HANA system
To distribute the customer and supplier master data of a retail site,
use the business partner Web service.
To distribute the retail site, use the data replication framework (DRF)
implementation for retail sites.

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.