Valuation at target costs on basis of alternative material cost estimate

What causes this issue?

The work in process or scrap was valuated in accordance with the
valuation variant defined in Customizing for Product Cost by Order or
Period in the <LS>valuation variant for work in process and scrap</> at
the target costs calculated on the basis of an alternative material cost
estimate.

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.