phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '51f79e69c85b70bf92d2bcd133d0155f' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('51f79e69c85b70bf92d2bcd133d0155f', -1, 1771930556, 1771930556, 'd849d892', -2, 0)

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