I would encourage you to keep your score! That is a good score, and you should be proud of it for your first time. I also took the August LSAT and scored a 145. This was my first exam too, but I see it as motivation to do well in November and show schools the increase from my first attempt to my second. Thus, take this as an opportunity to tell your story on how you bounced back. I think it's more impressive for schools to see how you improved from your first score than to hide it and score either the same, worse, or only a bit better without them knowing all the work you put in. Just my two cents for you to take, and hopefully this helps. We got this, and it's not over yet! You are more than your score!