phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO pinball_phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin, is_robot) VALUES ('6cb5817f2d2ef75a1747a0b1c1a8876a', -1, 1669742779, 1669742779, '12e83809', 51, 0, '0', '0')

Line : 175
File : sessions.php