Duplicate previous portal record
Except for record ID and date, most of the data in a particular portal row will be identical to that of the previous record. However,
a) It must permit over-writing and
b) Users aren't IT aware so providing a button to duplicate might confuse them as they won't realise that in effect the new portal row is a NEW record for that table, including new ID/date, but that they can/ should overwrite data as necessary.