phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('eecb9160f3a76989d5b820ce3c379808', -1, 1730423002, 1730423002, '1275ba7d', -1, 0, 0)

Line : 195
File : sessions.php