phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '7f9f3704a28f047cad7ac17da909fcac' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('7f9f3704a28f047cad7ac17da909fcac', -1, 1767053498, 1767053498, 'd849d893', -9, 0)

Line : 180
File : /www/includes/sessions.php