MacOS – How to suppress the Delete From All Devices confirmation in the Photos app

After trying the other "fixes" and nothing worked, I went with what was previously suggested here. Located the Nat Geo folder (HD>Library>Screen Saver>Default Collections>1-National Geographic) and removed those pictures. This does require your Administrator Password. Then I moved the pictures I wanted into that folder. This works, but it is not a fix as the Screen Saver still defaults to that folder.

You should check the iPhoto/Photos app and see if any of your 2006 photos are in the Last Month tab or the April 2015 tabs. If they are then the problem is with the photos' dates, not iTunes or your iDevice.