Why this lookup-ref that has the same attribute name points to the same :db/id ?

(let [db (db/db @db/db-conn)
      eid1 (:db/id (db/entity db [:db/ident :db/retractEntity]))
      eid2 (:db/id (db/entity db [:db/ident :db.fn/retractEntity]))]
   (= eid1 eid2))