Void option for Select-box Input

Hi 🙂 If I use Text Input, while I’m sending a comment with this value empty, it doesn’t appears in the comments list, and that’s ok. But how could I do the same with the Select-box Input? Now I’ve put “Select” as the first row, but obviously it’s displayed in the comments list (it should functions also with “-“).

Do you have any idea about how to avoid it please?

Many thanks
– Chris

https://ww.wp.xz.cn/plugins/wp-comment-fields/