Sections have assignment limits to keep your course running as smooth and quick as possible for you and your students. There are a few ways you can organize your section to make sure it never reaches the limit. If your section already has, the simplest way to reduce the number of assignments is to delete any unnecessary assignments.
See these tutorials to learn more about streamlining and managing your sections:
Manage your assignment list
Group assignments on your assignment list
Sharing and copying assignments
Creating your course and sections
Sharing and copying sections