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) VALUES ('5619a569bc115666cfb7a0190b8128cc', -1, 1178408259, 1178408259, '40d0acae', 1, 0)

Line : 158
File : /home/marathon/domains/thailandmarathon.org/public_html/bb/includes/sessions.php