Editing a project in Transport


I have defined a custom attribute "Translation(s) downloaded" as a check box for Transport users so that others in their group will know that the files have already been downloaded. The idea is that they would go to the Edit Project page to tick this box after downloading. However, when trying to save after checking the box, the warning "Due dates are required" is displayed and the updated project is not saved. Due dates are mandatory for the project and have been provided when creating the project.

Any ideas how to get around this?