Update Library Question

If I perform a Library Update, does the scan and scrapping only capture new videos and not change the existing data for files already in the library?

The situation I have in mind concerns a TV Series on DVD. The entries in the ‘thetvdb.com’ site are incorrect and the videos are not scraped correctly. The DVD Series and Episode number are out of sequence on the web site. I can get it to scrape correctly if I alter the file name to match what’s on the web site. However, should the site then correct the series ordering, would a further update of my library cause the videos to be re-scraped to the incorrect order?

Thxs