Hey,
Maybe this could be enabled as an option.
if you have multiple editors. That if you save while another user is editing or has the document open.
Display a popup “Are you sure? - this user username has the page currently open”
Maybe could include a notification down for others opening a page a page that is already opened by someone else.
WordPress already has the function to determine whether the post is currently being edited by another user. and other functions to assist with this feature.
Thanks