No NF metals exist for item &

What causes this issue?

Either the material for item &V1& has no metal content or you may have
attempted to display the NF data in a consignment fill-up, a
free-of-charge delivery, or in a free-of-charge item.

System Response

There is no NF data for items of this type. Maintenance is therefore
not possible.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.