Material & in plant & is irrelevant for requirements grouping

What causes this issue?

Material &V1& has not been defined as relevant for the requirements
grouping in plant &V2&.

System Response

The material cannot be taken into account in the requirements grouping
and the maintained breakpoint cannot be found. Please check the
<DS:GLOS.3526C35BAFAB52B9E10000009B38F974>planning group</> in the
material master record.

Error message extract from SAP system. Copyright SAP SE.