You need to change the permissions in the Setup Process components in the Model:CreateIncidentSimple and Model:CreateIncidentAdvanced. Click on the Model:CreateIncidentSimple on the list on the left hand side and double-click on the Setup Process component. There you will be able to see the permissons and set them.
Click on Model:CreateIncidentAdvance and click on the Setup Process embedded model
Double-click on the first Add Process Permissions and set the permissions there