Can someone tell me what this is?

[ancientmember]

Here is the message at checkout (after clicking the "checkout" button and the "continue" button on the next page) :

 

Fatal error: Cannot redeclare tep_db_connect() (previously declared in /includes/functions/database.php:13) in /includes/functions/database.php on line 13

 

When i go to the file specified, there is this code on the line 13:

 

function tep_db_connect($server = DB_SERVER, $username = DB_SERVER_USERNAME, $password = DB_SERVER_PASSWORD, $database = DB_DATABASE, $link = 'db_link') {

 

 

Any help will be greatly appreciated!