I allready added support tickets on Sega site for this, but i want to tell you this is a big problem for everyone i know that plays FM23 console on windows.
I tried to recreate the problem several times, and started new games. There is no logic in when the bug occurs. You can play for hours with no problem, then after you played a few seasons the autosave cant save the game.
You can not save it manual either, and in some instances the game shuts down back to main menu. Sometimes the backup save files disapaer too.
Yesterday when the save game happend, i could not save any of my older files either. Then the current active savegame gets deleted. This is a nightmare, so i hope you try to fix it.
Maybe the bug came with the new data update, i didnt have it until after. FM23 Console on windows has been the worst version since i started with CM in the 90s... so many bugs... and new failures..
I hope you will fix this, and make the next version better for us players. I miss FM Classic. The full game is just too much, its too slow. We married family men with children cant play 6 hours a day, and an quick game, with instant results are a great escape from the daily life.