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 ('bb09364e7213006539fc4f3c22500f6d', -1, 1711726590, 1711726590, '035b0b1e', -10, 0, 0)

Line : 187
File : sessions.php