My world updated from 1.16 pre-release 1 to 2 crashes every time i enter a neather portal

I have a world i started in 1.16 pre-release 1 that I updated to 1.16 pre-release 2 6/6/20 And every time i enter y nether portal to enter the nether my game crashes while ticking my player But i don't have this issue with a newly made world