[nobody can access my forum (phpbb)]

the only mod that i installed is a 'mass pm mod' but the error was occuring before that mod was installed. can i just re-upload the files through my ftp? or will that overwrite the changes i have made to the settings on the forum? ill also post on phpbb. thanks for the help!

[nobody can access my forum (phpbb)]

hi, im pretty new with the whole php thing, but was able to install the board myself the url is www.intuitbeauty.com/divachat/

but daily now everyone has been getting this error message when they go to that url:

phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 2

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('61442c6b245a7c029e24718fa842ed30', -1, 1154109558, 1154109558, '47f6375a', 0, 0, 0)

Line : 187
File : sessions.php

i have no idea what this means and havent been able to find any fix for it (i have seen similiar posts but with no luck on fixing it)

:( any help would be great