Material &1 in prod.supply area &2 is defined as release part in plant &3

What causes this issue?

Material &V1& is defined in production supply area &V2& in plant &V3&
as a <GL:release_order>release order part</>.
Therefore, it is not possible to use the material staging method for
crate parts.

How to fix this error?

If you do not want the material to be handled as a release order part
in the future, maintain the control cycle accordingly.

Error message extract from SAP system. Copyright SAP SE.