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 ('33b720dcad07b133f3eb88b91ae78ed9', -1, 1709025421, 1709025421, '2cd24d49', -7, 0, 0)

Line : 187
File : sessions.php