Documents update

My question is that I would like to update my uploaded documents. But I cannot update them without changing the url. I want to upload to the same url. How is this possible?

Hello, sorry for the very late answer. For some reason, we missed your question.
When you edit an already published record, you can only change metadata for a given version of the record (same URL).
When you upload a new file, or replace, a new version of the record will be created. This behaviour cannot be avoided by the user.
Eventually, administrators can replace files manually, but this operation is only in case something is wrong with the file.