Collision spawned object

Hello, i have a little problem. I have something where i can move objects, im working on collisions but i solve it for objects on terrain, but i dont have idea how to solve problem with adding objects. I click on terrain and i spawn object, but i want to make something that when i spawn object on other object - it dont spawn.

You can add a Tag to the spawned Object like “spawned”.

and on colission check ic the collider-object has no “spawned” Tag.

i have tagged objects and using it on other thing… but i have one idea, when i spawn object and its on collision with other object i destroy this object, question is if its so fast that user will dont see this