Temperature area &1 <= date &2: temperature missing in &3

What causes this issue?

No entry exists whose value or value from the previous year is equal to
or less than the specified date. Therefore, it is not possible to
determine a replacement value.

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?

Enter the corresponding values in the table.

Error message extract from SAP system. Copyright SAP SE.