Confirm the sample unit of measure &

What causes this issue?

The specified sample unit of measure must have a unit of weight, a unit
of volume, or have no dimension.

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?

Select enter to confirm the entry or change the sample unit of
measure.

Error message extract from SAP system. Copyright SAP SE.