No calculation of target costs in version & for fixed-price co-products

What causes this issue?

With fixed-price co-products, <DS:GLOS.variance>variances</> are only
calculated in <DS:GLOS.target_cost_version>target cost version</> 0.

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?

Perform variance calculation in target cost version 0. The following
applies to the calculation of variances for fixed-price co-products:
Target cost equals actual cost on the debit side.
Target credit equals actual quantity multiplied by the standard price
(fixed price).

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.