My b2evolution Version: Not Entered

Dear blog users, dear supporters,
I have the following notice under my categories:

The requested Blog doesn't exist any more!

My blog is still existing http://www.ebooks-blog.pk-pc-service.de/blogs/index.php

But unfortunately I don t know how I can delete this message. Please help. Thanks a lot!
Sincerely
lesnivila from Germany :D