How To Fix WR021 - Revaluation at cost not possible, as cost price would be 0

SAP Error Message - Details

• Message type: E = Error

• Message class: WR - Messages for Revaluation at Retail

• Message number: 021

• Message text: Revaluation at cost not possible, as cost price would be 0

What causes this issue?

You wanted to perform a revaluation at retail that does not affect
margins. In this case, the purchase price and the cost value are
changed in the same ratio as the retail price and the retail value.
If you revaluate at retail not affecting margins on the basis of the
data you entered, the purchase price would be zero. This is not
allowed.

How to fix this error?

Check your entries. If your entries are correct, check the Inventory
Management and Valuation.

Error message extract from SAP system. Copyright SAP SE.