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 ('3c65d07fce18f16db78e943cd2bd67af', -1, 1766680805, 1766680805, 'd849d83c', 2, 0, 0)

Line : 187
File : sessions.php