Game crashes then I can't log back onto world

I was playing mcpe with my sister trying to get her the achievements then when i was building at y140 to get the minecart achievement my game crashed and when i tried to re open it the game said "can not open ibxrektthesaiyan@yahoo.dbgt"

If my recorder didnt crash from minecraft crashing then i would have recorded proof that it came from minecraft pocket edition itself and not from modifying the world like everyone claims that you did when a world gets corrupted and cant be opened