These are most helpful if your system becomes unstable and you need to reset it to an earlier point where it was reliable. (entrepreneur.com)
With league finishes of 7th, 4th and 5th, and 3 managers later, the club has become unstable with much lower and inconsistent league results. (bigfreebet.com)
The most likely scenario is that an existing planet's orbit became unstable and it was kicked inward. (sciencedaily.com)