unremovable list item

I have a problem with removing an item, Cobra Kai, off my "TV Shows I'm currently watching"-list.
www.listal.com/list/tv-shows-im-currently-watching-motc83
No matter how often I try to remove it from the list, it always comes back.
Weird thing is I could add it twice, somehow. When I try to remove both, one always remains.
I don't know what to do about it. I hope you can help me with that.

Try creating a new section then move all the the items over
then delete the original section with the undesired items.

Thank you, it worked. Although, I had to rename my section for it to do so. Without that, the list would not accept the section after saving.