Yes, I get a warning every time, but I think she got two warnings and on the third one she gets expelled... and surely from the first one she can erase the fact of having her diploma early... that's what I ended up concluding...
I had other parts, but it was more the principal who called me at the end of each class to see if I wanted my diploma early... but I don't remember if she got a warning... her brother didn't have any offer of this type, I think, but I don't remember...
The problem is that you can't remove these warnings, for example by behaving well for a week...