How to stop continue optimise app in Yu Yuphoria? My mobile phone (Yu-Yuphoria) continue updating OS or optimising Apps and not stop.

Actually last night when I'm going to use my mobile it displayed black screen and then I did restart the phone.

At the time of restart phone as usual display "cyanogen" logo and then instantly going to updating mode and display "Optimise Apps". I gave time but this process is not finish. I also switch off device and switch on but same alway phone going on updating mode and displaying **"Optimise Apps".

I'm facing this issue last 2 days. If anyone have faced same problem then guide me on right direction.

In Short how to stop this continuously updating/optimising OS ?
After googling found only one way to get rescue of it.

You must need to do force restore factor. Use Below Step

1) Reboot your Device

2) When your mobile ON instantly press Volume Down Button + Lock Button

3) You mobile will be gone on boot mode 

4) Select 3rd option Restore factory

5) Select Option for Delete whole data select YES (Might be 4th option) 

6) Formate will be started (It will take approx 15 min)

7) When It will completed again your system will be display boot mode. You should choose Reboot Device 

Congratulation your device will be worked as normally.