phpBB : Erreur Critique

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '6f4f4bfc0f9dd3e72e982ae877f1a5e1' 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 ('6f4f4bfc0f9dd3e72e982ae877f1a5e1', -1, 1767894184, 1767894184, 'd849d8de', 4, 0, 0)

Line : 187
File : sessions.php