phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('b21c765cb9c71ad8f8ed1f4595ad949d', -1, 1715044999, 1715044999, '03910f01', -9, 0, 0)

Line : 189
File : sessions.php