Do you think "update" means the person puts the new information over the existing one, so that the previous history can't be seen?
I heard someone said "update" meant we cannot see the previous information history, so don't use update if we can see the information history.
I think update just means adding the recent information, and we can't know whether the previous information history is gone or not, which means it just depends on the person who update it.
up‧date1 /ʌpˈdeɪt/ verb [transitive]
1 to add the most recent information to something
So I can't tell with only the definition. Could you help me? Thanks