Exporting never touches the rekordbox database directly. From the toolkit folder, run:
That copies any audio you're missing into your library folder and writes an XML with this
version's playlist + every cue point. Then, in rekordbox: Preferences → Advanced → Database → enable
"rekordbox xml", point it at the XML, and drag the playlist in from the rekordbox xml tree in the browser.
You review everything before it enters your collection.