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 ('784054ad4ea4492456501a39133ad78c', -1, 1728638723, 1728638723, '03ec56b8', -2, 0, 0)

Line : 187
File : sessions.php