Maintain the valuation type in the mat. master record

What causes this issue?

You are trying to post a goods receipt for a purchase order with
account assignment for a
<DS:GLOS.3526C0D2AFAB52B9E10000009B38F974>material with split valuation
</> to a <DS:GLOS.3526C0D3AFAB52B9E10000009B38F974>valuation type</>
that does not exist and has to be created first.
If you control the <DS:GLOS.3526B881AFAB52B9E10000009B38F974>account
assignment</> for the <DS:GLOS.3526B8D2AFAB52B9E10000009B38F974>GR/IR
clearing account</> with reference to the valuation type,
inconsistencies may arise.

How to fix this error?

If you control account assignment with reference to the valuation type,
you have to add a valuation type to the material master record of the
material concerned before you carry out the posting.
<DS:TRAN.MM01>Extend material master record</>

Error message extract from SAP system. Copyright SAP SE.