If you've accidentally loaded incorrect classes into Hapara, you can now delete them using the new "Delete Data Loaded Classes" tool, which is available within Hapara Admin Console at the bottom of the Data Loader page:
To delete a class, simply type the name or email for the class, or the name or email for the teacher of the class into the search text field. A list of matching classes will appear.
Once you click on one of the classes in the list, you will be able to click on the "Delete Class" button to delete the class.
Note: After you delete a class, remember to update your Class Spreadsheet or SIS configurations to make sure that the class is not created again.