opensuse 42.2 x86_64 i update a location of a photo for example then i use the google photo export tool to update this photo i click on "launch transfer" then there is no dialog to accept replacement just we see the photo is transfered then in google photo we see that a new photo was added.
Philippe, Said thanks to Google to break Picasa API few days ago. Look well all comments and links given in bug #376913 Gilles Caulier *** This bug has been marked as a duplicate of bug 376913 ***
it is just to leave a trace of what is buggy with the point of view of user
Fixed with bug #376913