Disable/Remove default blog on Multisite Setup

The best solution is to set up a redirect in the web server.
If for some reason this is not possible, you can install a plugin like Simple 301 Redirects to manage the redirections from the default blog.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)