Could you possibly put a small thin fabric over it-with fusible backing, iron it on, then place your quilt label near it? I have done this before, so don't fret too much! It does happen! I have been able to slip a thin iron on patch behind the backing, done a couple of really small sewing stitches using light weight thread and a very small needle, then put the quilt label near it. The hand stitching around the label went near the 'hole' and I could barely see that a teeny tiny mistake was done. Best of Luck!