old_contents: # coding=utf-8
  from .auth import *
  from .groups import *
  from .messages import *
  from .users import *
  
new_contents: # coding=utf-8
  from .auth import *
  from .error import VKError
  from .groups import *
  from .messages import *
  from .users import *
  
subject: Use `vk.VKError` instead of `vk.error.VKError`