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 ('6f835522664f87e0a178f5fef7ac6959', -1, 1561003209, 1561003209, '36a11ff7', -2, 0, 0)

Line : 189
File : sessions.php