photoprism/internal/entity/migrate/sqlite3/20220329-093000.sql

UPDATE files SET time_index = CASE WHEN media_id IS NOT NULL AND photo_taken_at IS NOT NULL THEN ((100000000000000 - strftime('%Y%m%d%H%M%S', photo_taken_at)) || '-' || media_id) ELSE NULL END WHERE photo_id IS NOT NULL;