phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 3

INSERT INTO bb1sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('7affa28b9734bd26184d4063dc94b9fc', -1, 1409556332, 1409556332, '36c5b74b', 15, 0, 0)

Line : 182
File : sessions.php