Damage battery error in lenovo Z 50-70?

I have a lenovo Z 50-70 laptop. It was working good and have a battery backup of average 4 hrs. Suddenly one day i got an error that battery is damage please replace it.
My laptop battery was working fine. How can any battery stop working suddenly without any indication.
Is this problem is related to BMS. Can I repair my battery.

Please help

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