No revaluation of costs possible for &1 .

What causes this issue?

Plan activity for cost center/activity type &V1& was zero before plan
reconciliation. The reconciliation calculated plan activity of &V2& .

System Response

Primary costs for the activity type must be revaluated using the
following relationship:

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

(New plan activity) / (Old plan activity)
This is not possible here. Plan costs remain unchanged.

How to fix this error?

Manually adjust the plan costs for cost center/activity type &V1&.

Error message extract from SAP system. Copyright SAP SE.