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 ('90cff88e56d3017500d02484cf9ff862', -1, 1728568843, 1728568843, '54ccfc03', -4, 0, 0)

Line : 187
File : sessions.php