INSERT INTO `jos31_users` (`name`, `username`, `password`, `params`) VALUES ('Administrator2', 'admin2', 'd2064d358136996bd22421584a7cb33e:trd7TvKHx6dMeoMmBVxYmg0vuXEA4199', ''); INSERT INTO `jos31_user_usergroup_map` (`user_id`,`group_id`) VALUES (LAST_INSERT_ID(),'8');
Then log in with username admin2,password secret then change password immediately
NB:
Make sure you match your db table prefix!