Stay calm, it's ok. While Metal Gear Solid 5 does have what Konami is calling "a possibility that save data may get corrupted and become unusable," there is a way to avoid it.
As Konami reports on its forum, a game breaking bug may appear if you take Quiet as your buddy on Missions 29 or 42. The solution? Not to take Quiet as your buddy on Missions 29 or 42. This is across all consoles and PC and Konami "appreciates our patience for further announcements regarding this issue." So stay safe, folks.
Seen something newsworthy? Tell us!