Can you delete an attachment within DOR, but retain the actual record?

Summary: Post COVID and due to changes within the health industry, client has requirement where they no longer wish to keep a digital record (attachment) of employees vaccinations but do want to keep the actual record that they are immunized and documentation was sighted, but not stored/retained.

So we looked into running archive and purge process for this one Category. All documentation indicates if DOR archived and purged, then all attachment deleted as well.

Is it possible to delete ONLY attachments but keep the record? This is due to privacy concerns and data appearing on the certificates, so they do not wish to keep the supporting documentation moving forward. Checked Document Types and