removing files from seeding torrent

[lvm]

Suppose I have downloaded a complete multi-file torrent and then decided that I don't need some of the files. If I delete these files, pause the torrent, recheck it and mark these files as 'skip', on resume deluge starts downloading some of them presumably to create .parts file with partial pieces. It's only a little bit, but it's an annoyance and might be a problem if other seeds are unavailable. Is there a way do avoid it and create .parts file from the files I already have before I delete them? 2.2.0 linux.