Moving the circle doesn't usually present a problem.
Adding new circles presents a problem because then you get different internal names for the edges and the fillet gets attached to the wrong place.
Moving the circle can create a problem if, for example, you specified a 5mm fillet but now the circle is only 3mm from the edge and therefore the fillet doesn't fit.
Adding new circles presents a problem because then you get different internal names for the edges and the fillet gets attached to the wrong place.
Moving the circle can create a problem if, for example, you specified a 5mm fillet but now the circle is only 3mm from the edge and therefore the fillet doesn't fit.