Can't perform data migrations using django 1.5 Custom user class

I have many applications with historic south initial migrations, which i wanted to convert to django 1.5 applicable. So i swapped out all orm['auth.User'] relation with custom ones, but when i try to run those migrations i get following error:

Error in migration: django_notify:0001_initial

KeyError: "The model 'customuser' from the app 'profiles' is not available in this migration."

The migration in question is this:

http://bpaste.net/show/2CwaYrlNifNTd5gcHUfK/

My custom User class is:

class CustomUser(AbstractUser):

    image = models.ImageField(_('Image Field'), upload_to='user_images')

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