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 ('356b35ff97d8381db11b7739815ab1a0', -1, 1768309692, 1768309692, 'd849d853', -6, 0, 0)

Line : 193
File : sessions.php