BuddyPress.org

korhanekinci, this is a change that I made in the database itself. I use phpmyadmin for database manipulation.

In this case the operation (i.e. the SQL query) was pretty simple, but if you haven’t manipulated the database directly before then it is a little risky. One thing you definitely want to do is to create a backup copy of the db before starting.

I’m working on a test version of my site so there is no risk of damaging the production version.

The SQL query I used:

UPDATE wp_users SET user_login = user_nicename WHERE 1