Please add a Test Plan here.
The mass creation dummy submissions have caused a lot of issues with duplicates. While SAK-40742 and SAK-40817 have helped eliminate the creation of duplicate submissions this JIRA focuses at the automatic cleanup of duplicate submissions.
Strategy for handling submissions that can't be automatically removed
Assignment tool breaks on duplicate submission scenario
Velocity error viewing assignment with duplicate submissions
Assignments / duplicate submission issue
Assignments: Instructor receives error when clicking on Grade and no students have submitted