Removing Lingq's

I hope that this is the right Forum, and that I have not missed the answer to the problem elsewhere.

I would like to know how to eliminate a lingq that was created in error. I find that a group of words in my text are now included together in a box, as if it was a phrase that I wanted a definition for. I would like to get rid if that box. I don’t remember doing it, and I cannot see how to change it. It interferes with my making the word groups that I want.

I have tried selecting all the words in the box and marking the phrase as known or ignore. I have also brought up a list of all the lingq’s I have made and tried to find how to delete that lingq.

What am I missing?

Usually I just highlight the phrase and hit X on my keyboard and it goes away.