Characteristic is a navigation attribute

What causes this issue?

Characteristic &V1& is a navigation attribute. It will be deleted from
the local list of characteristics prior to the determination of the
characteristic combinations.

System Response

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

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.