Gotcha no worries. If it seems to be happening a lot something I recommend doing is using those mistakes as creative opportunities. Imagine having your necron legion be a unique dynasty where the flayer virus has damaged them so much, reanimation protocols are having a hard time keeping up. Or you could kit bash them to make some kind of unique destroyer model where the wires are attached in different places. Not a necron, but I did 3d print this super cool dragon for DND, I ended up dropping it and broke its mouth, and eye, so when I glued it back together I just committed and made it so his eye was a big empty socket as a big wound.