how to remove site name from torrent file

i want to create new torrent file from another torrent file.that file contain site name in info.how to change name of the torrent without damaging torrent?

If you create based on another, it probably automatically downloads data from it, so you can't modify it.

Just download all the files from the original torrent, edit them how you want, Than make it a new torrent file using Utorrent or qbitorent or any torrent program. https://i.imgur.com/LdIrhwG.png Just be aware that this will count as a new torrent, it will not "overwrite" an already existing torrent, you will not receive the same seeds/leecher stats and you will need to upload it to various websites yourself.
If you're just looking to edit an existing torrent, As far as I know you cannot. As soon as you modify anything you break the hash function.