Inbound processing for serialization group & is not defined

What causes this issue?

Inbound processing with sending system <(>&<)>v2<(>&<)> has not been
defined for message types of serialization group <(>&<)>v1<(>&<)>.

System Response

How to fix this error?

In ALE Customizing, maintain inbound processing for serialization
groups in the appropriate client.

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.