Crash when entering edited zone! :(

[Gorge]

Heyo.

ive learned how to edit wmo (buildings and such) today, i changed all houses from brill in tirisfal glades into blood elf ones.

Now when i logged in at my char which is in tirisfal glades, wow just shut down with the message "Error" no details or anything about what the error was :\

I made a new char, .cheat fly from dun morogh to tirisfal, but as soon i entered the zone where it said "tirisfal glades" on my screen, wow just shut down, no errors or anything :\

Tested multiple times with diffrent chars.

What did i do wrong?

Thanks in advice! (+rep)