Grouping model causes critical problem

Загрузка Desktop 2021.12.27 -
hello im tried to build some stuff but i have problem
when im grouping lights

it creates new folder with same lights (sometimes model is empty)
but when im deleting model its deletes lights, also im getting models with invisible icons and i cant delete them
and when im enter script in workspace to find scripts im seeing models without icons when im clicking them they dissapear
what do i do
is there some virus or its some studio problem

If the light effects are contained within the Model than you delete them. Make sure the light effect is inside of the “Light”- model

well im fixed it with entering script finding empty models clicking them and after they gone im deleted free models which my friend made (clothes stand)