Ticking Screen Crash

Cannot join any 1.7.x server after downloading 1.8.7.

This video will show the problem: https://prtscr.us/c/05066W8.mp4

What I expected to happen was...
To join a server without issues.

What actually happened was...:
Crashed with this error: http://hastebin.com/jekizojozu.yml

Steps to Reproduce:
1. Download and run 1.8.7.
2. Close the game.
3. Run the launcher, use 1.7.9 or 1.7.10.
4. Join any 1.7.9 or 1.7.10 server.