How can I restrict users from deleting attachment files on Purchase Requisitions RSSP ?

Hi everyone,

I want users to be able to upload and view attachments, but they must not be able to delete or remove any file once it has been attached to a Purchase Requisition (RSSP).

Can this be done by:

• Adjusting security privileges / duty roles?
• Hiding the Delete icon using Page Composer?
• Or customizing the RSSP attachment section using Visual Builder?

Has anyone done this before or knows which privilege controls the delete action?

Thanks!