Realms corrupted me and my friend's realm!

Put the summary of the bug you're having here

What I expected to happen was:

I log into the realm, and everything is fine.

What actually happened was:
I logged into the realm, and EVERYTHING was destroyed! my chests with diamonds were gone, buildings were corrupted, and the whole thing was strait up trashed!

Steps to Reproduce:
1. I just logged into the realm
2. 
3.