Message SAP WV521 - The key date for archiving cannot be a future date

Diagnosis
You have entered a future date as the key date for archiving pricingdocuments. You are only allowed to enter past dates, however.

Procedure
Change your key date entry.
If you wish to archive documents that are still valid now and until adate in the future - as you might wish to do if you are in the processof discontinuing articles - you must first cancel or delete therelevant pricing document items. Cancelled items do not have to bearchived on a key date. Deleted items are never archived on a key date.