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 ('405cc80a4e1a7bea2e51e17e4192fe66', -1, 1540330693, 1540330693, '36e0387e', 3, 0, 0)

Line : 187
File : sessions.php