Enter either key date for days in arrears or standard

What causes this issue?

You have choosen at least one of the four possible due date sorted
lists. A key date for due dates is needed for the calculation of the
days to include them into the sorted lists. However, you have not
explicitly entered a key date for due dates nor have you chosen a
standard key date for due dates.

System Response

Cancellation of processing.

How to fix this error?

Please check your entry.

Error message extract from SAP system. Copyright SAP SE.