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 ('f5e21663b288c6c211c65034ad1e0138', -1, 1571862560, 1571862560, '12d09f19', -4, 0, 0)

Line : 187
File : sessions.php