Exported Playlist some tracks won't transfer open Key notation

I created a playlist of new tracks in Rekordbox opened Lexicon imported the playlist and then exported it back to rekordbox. Five tracks are missing the open key. I tried to do this again but that doesn’t fix it. What should I do?

Did those tracks all have keys before importing into Lexicon?

And can you show screenshot of that playlist in Lexicon with the Key column showing?