Answered
Editing metadata in Lightroom CC 2017
Apparently impossible with CC 2017 (capture date). I tried to edit metadata with CC Classic, and then re-import into CC 2017 , but this does not work, old metadata persists in CC 2017 after re-import. Any ideas? Will it work if I sync CC Classic to cloud (I would myself, but I have some 90000 items, so syncing will take ages).