Create a symlink to a Fred resource

It doesn’t seem possible to create a symlink to a Fred resource. Am I correct in thinking this? Using the same Fred template and entering a resource ID of an existing Fred resource, saving the page gives the error “No fingerprint was provided.”

I can’t see any reference to handling symlinks in Github other than a commit by matdave instructing Fred not to load on symlink resources in the manager.

Is this a missing feature?