Valuation category & does not allow split valuation

What causes this issue?

You have entered a valuation type although the valuation category on
the accounting data screen does not allow split valuation.

How to fix this error?

Enter a valuation category that allows split valuation on the
material's accounting screen.
Define the material's valuation type in accordance with this.

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

Error message extract from SAP system. Copyright SAP SE.