I tried this new importer on my alt account and it appears that it ignores the recording_mbid (among other fields) in the listens of the json files provided, as it leaves it to the automatic linker of listenbrainz to link listens to musicbrainz.

This means that any listens that I manually linked will probably not be linked by the listenbrainz autolinker on separate accounts, as the different accounts don't have that mapping.

PS. This makes me think that another cool feature would be to separately import the manual mbid mapping of user or import both the the mbid mapping upon importing the history, this could maybe be a separate ticket