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 ('d9f5758b58a55ddeb331b92f93f27754', -1, 1728638002, 1728638002, '03ec56b8', -11, 0, 0)

Line : 187
File : sessions.php