OLM - Need to delete certificated online class enrollment that is in Learner History

We have a number of cases where learners are subscribed to certifications in OLM (Self-Service - Learner Home), and when they have completed the associated online self-study class, the enrolled/completed class has been moved to History.

The certification needs to be renewed but the class in History is preventing enrollment and playing of the class to update the certification to "Certified".

How can I resolve this? In Learning Administrator "Subscriptions and Enrollments", the History item is not shown; and unsubscribing or deleting the certification and re-subscribing and enrolling does not present the enrolled class in My Current Enrollments to allow it to be played.