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 ('9b0161a3c34a97e1624b20fde2a2e327', -1, 1219241093, 1219241093, '26673f3c', 0, 0)

Line : 152
File : /announce/includes/sessions.php