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 ('22fef6267a1e9315e0cfa9061523c56e', -1, 1490399460, 1490399460, '32106160', -10, 0, 0)

Line : 187
File : sessions.php