Carrera Virtuoso Rear Derailleur hanger bolt hole with HeliCoils?
It's a little unclear, but I'm gathering that you've got a hanger that secures with two little screws, probably M3x0.5, that thread into the frame, and those frame threads are toast with some distortion/warping of the holes also present. If so it depends on how enlarged the holes are - the oversize tap that would come in the M3 helicoil kit has to have enough material to cut into to do its thing. Beyond that, there should be no issue.