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 ('3c9a39b5beda196e6424550b14ed8541', -1, 1754676498, 1754676498, 'd849d871', -9, 0, 0)

Line : 189
File : sessions.php