crack in my solar panel

Hi, I bought my Delta pro 3 last year but I am just getting to the solar panel set-up. They have been stored in my home and unopened but when I went to set them up I noticed a crack in one of the panels. It looks like a windshield crack. I am so bummed about this. Can I still use the panel with a crack? It is toward the bottom of the panel . If I shouldn't use it, can you buy just one panel? thank you