phpBB : Erreur Critique

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '81000ae6c3c52acddfa54d3e6ecf915d' 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 ('81000ae6c3c52acddfa54d3e6ecf915d', -1, 1770890148, 1770890148, 'd849d87a', -9, 0, 0)

Line : 187
File : sessions.php