Internal procurement not defined for material &

What causes this issue?

You have entered the procurement type for in-house production. However,
the <GL:material_type>material type</> listed in
<GL:material_master_record>material master record</> &V1& does not
provide for in-house production.

System Response

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

How to fix this error?

Check the correctness of the procurement type/
<GL:material_number>material number</> you entered.

Error message extract from SAP system. Copyright SAP SE.