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 ('201a88e83a056c502539bd3c96afb6b9', -1, 1568937494, 1568937494, '22ccb0bd', -6, 0, 0)

Line : 189
File : sessions.php