Model view & is completely in the past

What causes this issue?

The model view you have created is completely in the past.

System Response

Because the model view occurs in the past, the model is not used.

How to fix this error?

If you do not want the model view to occur in the past, change the
validity period.

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.