Accidentally Deleted 496 movies from my Watchlist

@Yasin_Kamis  We can sometimes recover an entire deleted list if reported quickly as there’s a short delay between a list being deleted on the front-end and it being “cleaned-up” on the back-end, however, we do not keep a version history for any individual list items — once you delete items on the front-end, they are deleted immediately on the back-end.  We are therefore unable to recover your list items, sorry. 

To avoid this in future, we recommend regularly exporting your list data such that you always have a local copy. 

Hope this helps.