Ok i see
I don't know if it's the best way, but i'd do it like this :
[code:pzg7w1fp]+ MouseKeyboard: On Left mouse button Clicked
-> Sprite3: Destroy
-> System: Create object Sprite3 on layer 1 at (MouseX, MouseY)[/code:pzg7w1fp]
You can check the attribute "destroy at startup" on Sprite3.
If you want to spawn multiple objects, just remove the destroy line.