Select one valuation principle only

What causes this issue?

You have either selected several or no valuation methods.

System Response

For valuation purposes, the system requires that you specify a valuation
method.

How to fix this error?

Please place an "X" against just one valuation method.
If you want to compare the results of different valuation methods, you
must create a version for each individual method.

Error message extract from SAP system. Copyright SAP SE.