Material & is not a header material

What causes this issue?

The material &v1& is a material header that represents the version of
material. This context requires that you enter a concrete version,

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?

Enter a version of the material &V1&.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.