With course duplication, you can create a new course with the exact same content as your existing course.
Go to Courses under content
Click the options button next to the course you wish to duplicate
Now select Duplicate course
Confirm duplicating your course
Great! Now the course duplication is in progress
You will receive an email on your registered ID when the course is duplicated
Once done, the duplicate course will be visible on your dashboard
Deleting any item from either of the courses (original or duplicate) does not affect items of the other course.