Quoted from big-c66:
Ok I installed 1.54 n I’m getting the validation error so do I take 1987 version out n go back to 1.53 n then back. Help the big man out I get a little confused on this stuff lol
Grab the stern 1.54 code and put it in the machine. Play a game or two, until the validation errors go away. Then swap back to the 1987 code.
Should only have to do this one time.