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 ('2b84e0abffa5a37d07eb735d083befb6', -1, 1748496965, 1748496965, '1275884f', -9, 0, 0)

Line : 190
File : sessions.php