No objectid mapping when importing a backed up course

[TamaroWalter]

Error: Importing a previous backup from a course with moodleoverflows is not possible
Error Message: In order to restore course logs accurately the event "mod_moodleoverflow\event\course_module_viewed" must define the function get_objectid_mapping().
How to reproduce: Make a backup of a course with moodleoverflows and include the user data. Then create a new course, select "course reuse" and import the backup.