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 ('030d2060bb082948c222ab900a204f0d', -1, 1540332607, 1540332607, '36e0387e', 0, 0, 0)

Line : 189
File : sessions.php