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 ('39ab2a2b948a50c96b416b61a817a833', -1, 1714003395, 1714003395, '039145ff', -8, 0, 0)

Line : 187
File : sessions.php