Need help on WP

Hi all,

Very often my wp site getting this alert. I have done fresh install aging. You have any tips so that I can avoid this alert.

No WPMU site defined on this host. If you are the owner of this site, please check Debugging WPMU for further assistance.

When you reinstall, make sure to delete old wp-config.php!

Are you trying to install WPMU or a single WP installation?