Since we started Adagio last year, whenever we do a Day End on OE there is a pop-up... "Document (a long list of order numbers in random) already exists in this history datafile. Do you wish to overwrite the existing document in history with this document?" We always press "no" to it. The list of random order numbers keeps getting longer as we keep putting new orders. Is there any harm if we press "yes" to overwrite them?