Premiere pro video fast forward on its own without changing the speed of the video.

I have issue with premiere pro, I was using premiere pro cc 2015 but because of updating my premiere pro to 2017.01, the file that I open have issue. The videos suddenly fast forward on its own. I did not change the speed and Is there a way to downgrade back to 2015?

Is this an issue with frame rate? Because my footage uses different camera.

​[Moved by moderator from the non-technical Lounge Forum to thePremiere Pro Forum for technical help]