Why is "clone" the only option in some of my boards' menu?

Account admins and owners can access, edit, clone, rename and delete all boards in the dashboard.

But project manager users have full control of only those boards, that they created themselves, or that they were made an owner of.

For that reason, on boards that a project manager user has not created, nor owns, but has been given access to, they will only see the clone option.