phpBB : Erreur Critique

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'ac9a6a167a9732d81b481d7cd2ea5998' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('ac9a6a167a9732d81b481d7cd2ea5998', -1, 1769206159, 1769206159, 'd849d869', 5, 0, 0)

Line : 187
File : sessions.php