The metadata about the linked document (https://www.ietf.org/archive/id/draft-peabody-dispatch-new-u...) is at https://datatracker.ietf.org/doc/draft-peabody-dispatch-new-... which shows that this is indeed a very old draft.

The linked document is version 01 of the draft, that draft went up to version 04 before being replaced by draft-ietf-uuidrev-rfc4122bis (https://datatracker.ietf.org/doc/draft-ietf-uuidrev-rfc4122b...), which then went up to version 14 before finally being approved as RFC 9562.