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 ('6c34e4eb4cd6919c3f21eb3639f6c3db', -1, 1569018392, 1569018392, '12cf88b8', -4, 0, 0)

Line : 189
File : sessions.php