In DB Browser, delete the two triggers, and write (commit) the change:
fts4_metadata_titles_before_update_icu
fts4_metadata_titles_after_update_icu
Run your metadata update SQL statements. For example, to chronologically reorder:
UPDATE metadata_items
SET added_at = originally_available_at
WHERE library_section_id = 25;
Then recreate the two triggers, then commit:
CREATE TRIGGER fts4_metadata_titles_before_update_icu BEFORE UPDATE ON metadata_items BEGIN DELETE FROM fts4_metadata_titles_icu WHERE docid=old.rowid; END
CREATE TRIGGER fts4_metadata_titles_after_update_icu AFTER UPDATE ON metadata_items BEGIN INSERT INTO fts4_metadata_titles_icu(docid, title, title_sort, original_title) VALUES(new.rowid, new.title, new.title_sort, new.original_title); END
As always, as a precaution, shut down Plex, and make a copy of your DB first before making edits. I have no idea what would happen if Plex started updating libraries after you delete your triggers, but probably nothing good.
Also noticed that, for those who use UpdateTool for IMDB ratings, the code was recently fixed to do exactly the same thing with those triggers.