phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '1ffc0c8e0f223816d581ea41b1436935' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('1ffc0c8e0f223816d581ea41b1436935', -1, 1770478237, 1770478237, 'd849d802', -9, 0)

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