These has been some kind of changes made some years ago, it caused some working flames to break. This made quite some flames broken, such as the old way of making stable flames.
And reforging a flame is just impossible, some flames are pretty unique and special, like flame ID 1 made by hampa for example, if someone would just change the flame with some reforming thing, then the first flame ever made was made by an account created in 2016. That wouldn't be cool.