Hi all, I create a prefab and use that prefab in Unity to make the level design.. The problem becomes very big when I want to change the model of my prefab. Lets say I use Rock prefab to place rocks in my level.. I changed my mind and instead of using the Original Rock prefab, I want to use Bigger Rock model. so I update the Rock Prefab with the new model and everything goes wrong.. All the positions and rotations that I assigned first using the old RockPrefab are wrong and I have to reposition again every time I change the model file.. How can I solve it... This is really time consuming if you have to reposition everytime in the level as the level is so big..

Can anyone Suggest the best option...