That's something you have to decide, I doubt anyone will notice but is it something you can live with.? I don't think I would have noticed.
Why is it when we realize we made a mistake it's NEON to us. I've done the same thing and I've also let it be and took it apart to fix. It depends. One, I made was right in the middle and I had already done some hand quilting around it, that one I just had to fix but I was not a happy camper doing it, Yours is on the edge and shouldn't be too bad to fix. I have started taking pictures of my things and it has helped me to find boo boos, and I look at them several times before I quilt them. After all the work that goes into them it can throw you for a loop when this happens.