phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO magpies_phpBB_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('2747bf050379e2a45eddda82edbe3fe0', -1, 1656801912, 1656801912, '03ee7d4c', -6, 0, 0)

Line : 282
File : sessions.php