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 ('63e1163dba760794b0b7f4c5821d0036', -1, 1722068452, 1722068452, '03911203', 0, 0, 0)

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