SPACE is not a supported meta-value

What causes this issue?

SPACE (blank) is not a meta-value that can be used for key figures.

System Response

Processing stops.

How to fix this error?

Choose another value or another meta-value for your key figure.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.