Notebook Model Path contains UUID ?

[Carreau]

Some time JPY_SESSION_NAME was introduce to less kernels know about which file they were attached to,

in particular this was set via

sm.create_session(
                    path=path, # where this is supposed to be the path of current document.
                    kernel_name=kernel_name,
                    kernel_id=kernel_id,
                    name=name,
                    type=mtype,
                )

Currently this seem to contain UUID, like I get sessions IDs that are like: 'path': 'tests/34361149-e3d8-4dbc-9302-0e86431b3e8c'.

Is that on purpose ?