Change an existing assignment status at the course level to inactive?

Summary:

We have a learning assignment that originally ran on 6/2/25 at the course level. It renewed and reassigned the annual learning to the applicable learners in the roster. We want to terminate this process so it does not run again. The course has already been end-dated. The materials within this course are self-paced in one single offering, which has also been end-dated. How do we change the existing assignment status at the course level to inactive? We would also be willing to delete the assignment, so long as it preserved the historical completion data that is visible in the roster.