The unit of measure & is not defined as an alternative unit of measure

What causes this issue?

You have specified the unit of measure &V1& as a lower-level unit of
measure. However, it has not yet been defined as an alternative unit of
measure.

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?

First define the unit of measure &V1&.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.