For those looking to do this using DB Browser (thanks to @yooniverse ):
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.
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