Put a project.json file in the main folder of that project (sample structure below) and republish.
{ "description": "Blank Project", "version": "2016.2.6232.26817", "main": "Main.xaml", "id": "Your project name", "dependencies": {}, "configurationOptions": {}, "excludedData": [ "Private:*", "*password*" ] }
You could also just create a new project, copy the project.json from it and change relevant parts - it should work.