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 ('794f683033c8ee0a7deb4f0b1b7dc786', -1, 1634688444, 1634688444, '22e7f315', -11, 0, 0)

Line : 187
File : sessions.php