No values have been defined for a variant-creating characteristic

What causes this issue?

You wanted to define variants for a
<DS:GLOS.3526BC6EAFAB52B9E10000009B38F974>generic material</>. However,
no values have been defined for one of the variant-creating
characteristics.

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?

Define admissible values for the variant-creating characteristic.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.