phpBB : Erreur Critique

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'bd638be6a5f2b662cc3bde0d77de8bf7' 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 ('bd638be6a5f2b662cc3bde0d77de8bf7', -1, 1770883976, 1770883976, 'd849d87a', -9, 0, 0)

Line : 187
File : sessions.php