phpBB : Erro Crítico

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 2

INSERT INTO f_activesessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('83e0de1d5266195b690e856673319672', -1, 1762170852, 1762170852, 'd849d872', -9, 0, 0)

Line : 187
File : sessions.php