Last couple of weeks I have been having this problem: basically every time I turn my PS4 on, I have messages in my notifications telling me my saves could not be uploaded. When I click on the failed upload, it says the data was uploaded from another PS4 and asks me if I want to overwrite it. That's false, I have never even signed in from another PS4. I started to notice this with Child of Light and now both Wolfenstein and Transistor are doing the same thing, so it must be a system problem.
I have bought all these games digitally on another account, but both accounts have this single PS4 set as the primary one.
Anyone with a similar issues or perhaps a suggestion how to solve it?