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 ('731b8d75b3b81537e0c852eef6996f5d', -1, 1728634792, 1728634792, '03ec56b8', -11, 0, 0)

Line : 187
File : sessions.php