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 ('ee9ce4d1c0944c8514d32b2455dee2a1', -1, 1730419866, 1730419866, '0d3b3d93', -9, 0, 0)

Line : 195
File : sessions.php