I think there really are multiple of the same filename. At least for me, when I saw this error in 7zip and eclipse in win10pro, I think it was caused by ubuntu on a shared ntfs drive I mounted into both ubuntu and windows, when I called a tkinter window in python3 and i told it to write pixels outside the size of the window (by accident) and it kept crashing the spyder IDE. I noticed when I went back into windows that there were 2 of each java class in eclipse, and one of the files it was writing...