Yes unfortunately that is permanent. The problem is that CSR racing 2 uses the phone memory to record and maintain all purchases when you’re offline, the hack uses this work around to give you unlimited gold/cash. The server has it’s on count on what you actually have, and so if you spend a million cash and you only have 1000 the server side updates and it basically gives you a negative amount, which in your screen resembles a 0. Unless you win 990,000 cash to update this negative it will stick in 0, which obviously is impossible to do without spending real world money, or you’ll have to install the hack again and play this way. Those are really your only 2 options at this point.