NFSMOUNT
-- MOVIES
-- Movie1 (2012)
-- Movie2 (2018)
-- TVSHOWS
-- Show
-- Show.s01.e01.mkv
-- Show.s01.e02.mkv
-- AnotherShow
-- AndAnotherShow
^ I'd use a single NFS mount with separate folders underneath it for content. Edit /storage/.kodi/userdata/sources.xml to change the paths to align with that. Delete existing DB files, restart Kodi to start over clean, then set the content types and scrapers to use for each source and then rescrape. Don't obsess over trying to reuse existing library data. As long as you named everything correctly in the first place it will all (re)scrape easily.