Generating a Word document, converting to a Pdf and deleting the Word afterwards, so the result is a Pdf only, are often used document generation steps.
Unfortunately, it is not possible to overwrite an existing Pdf when converting a Word document to Pdf.
So we usually have to delete the original, but I would prefer having an updated than a new Pdf.
I would wish there was an option like the Mode in the "Generate/Update a Word file" to select whether to update an existing file or to create a new file.
A feature even WEBCON could use in their licence order process when generating the order document more than once ;)