Stock trans. requis.: Check. rule not maintained for doc. type &, plant &

What causes this issue?

An availability check can only be carried out for a material if a
checking rule is maintained for the combination document type and
delivering plant in Customizing.
This entry is missing for the document type <(>&<)>V1& and the
delivering plant <(>&<)>V2&.,,

System Response

The documents with document type <(>&<)>V1& and delivering plant
<(>&<)>V2& are not considered in this run.

How to fix this error?

Maintain the corresponding entries for the stock transport requisition
in Customizing.

Error message extract from SAP system. Copyright SAP SE.