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 ('69dd05c2bbd7091e3771b6b61b8c2f09', -1, 1713623619, 1713623619, '0390d491', -6, 0, 0)

Line : 187
File : sessions.php