When creating a new Knowledge Model (i.e. Questionnaire for filling out your DMP) you can either edit an existing Knowledge Model or start from scratch - which one it will be you decide in the field "Based on".
Create Knowledge Model
Click on the "Knowledge Model Editor" on the Dashboard.
Then click on the "Create" in the upper right corner.
Fill out the name, Knowledge model ID, and what Knowledge Model you want to base it on, or you can start a Knowledge Model from scratch.
To finish creating the Knowledge Model don't forget to click on the "Save" button.