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 ('256994d8edf7fa9786d1b182510abfb5', -1, 1568936240, 1568936240, '22ccb0bd', 9, 0, 0)

Line : 189
File : sessions.php