When importing a blog, image's URL has changed, adding a number to all URL. Images are in the Library of new site, but image sources in posts don't match with new URL, then, no image is shown onto the blog. There are about 400 attachments, too much for fix it one by one.
The question is if there is any way to resolve this issue without changing 400 URL, nor creating a new blog and making a new import.
This is a resume of a question asked originally in Spanish forum by another user: