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 ('973e91a22068886d5e5d86df7e658a8b', -1, 1762701697, 1762701697, 'd849d858', 2, 0, 0)

Line : 187
File : sessions.php