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 ('56bc133e654c03bf835342bf00fec7a5', -1, 1722040890, 1722040890, '03907746', -1, 0, 0)

Line : 172
File : /home/rebkell/public_html/boards/includes/sessions.php