COURSEPRESS deleted units in workbook

Hi I made a course based on the example...
I removed the original units but now the units keep coming up in the students workbook
- Sed egestas erat nec purus
- Pellentesque eu arcu in metus
- Donec rutrum tempor rutrum

They do not show in the coursestructure or in the wp-admin edit screens..

How can I remove the 3 units from the workbook view?