(1) Disconnect your console from the internet (you need to do this to change the date on your console, otherwise it syncs to the correct date).

(2) Set your system date back to last month - don't worry about changing the day and year, just change the month back to 11.

(3) Delete your corrupt game save. (of course you'll lose all progress, but I believe there's no way of uncorrupting the file anyway)

(4) Start the game - it will work! So long as you stay off the internet so your date stays as last month, then it should continue to work.