Registering for multiple offerings under one course.

Summary

How can Learners register for multiple offerings under one course.

Content

Hello! I have a course that is a lunch and learn, its the same discussion topic every month. I was advised to create one course and multiple offerings, e.g. offering lunch and learn January, offering lunch and learn February, etc. Now that learners are starting to register, we've realized they cannot register for more than one offering under the course. Is there a way to allow learner to register for multiple offerings under one course?

I appreciate your help!