bbPress.org

The constants have different names in wp-config.php and bb-config.php. Just copy and paste the VALUES not the whole line.

bb-config.php:

define( 'BBDB_NAME', '123456789' );

define( 'BBDB_USER', '987654321' );

define( 'BBDB_PASSWORD', 'goodpassword' );

define( 'BBDB_HOST', 'localhost or something else' );

wp-config.php:

define('DB_NAME', '123456789');

define('DB_USER', '987654321');

define('DB_PASSWORD', 'goodpassword');

define('DB_HOST', 'localhost or something else');

For bbPress, the constants are name BBDB_ and for WordPress they’re just DB_. You can copy and paste the values, but make sure you don’t change the names from BBDB_ in your bb-config.php.