Happens every Football Manager cycle and gets posted in the bugs forum as well as who ever researches for the A-league and their clubs doesn't check or forgets to check what new players wages are in relation to the salary cap or which ones should be covered by their parent club if they are on loan.
It's beyond annoying every year to know I have to buy the editor and manually fix every A-Leagues club's wages and player registration details before I can do a A-League save otherwise all A.I clubs release all their players.