How to turn off multi-line typed answers in anki?

Since I’ve updated anki, some of the cards I’ve made have turned out as multi-line typed answers where there are two answers: one of them being the answer I’ve written and the other one an answer marked with grey and an arrow, in other words a multi-line typed answer. How do I delete the second answer so I only have one answer, namely the answer I’ve written by myself?

I don’t recall the type-answer code changing any time recently. One possibility is you were using an add-on that altered the default behaviour, and the add-on is not working in the new version.