DropElementWdg Tactic 4.5

[listy]

In the project schema I have my "asset" node related to the "scene" node using "asset_code" to "code"
Not sure if this is what you mean?

I would not recomend you to change relationship on already "in use" projects, as it will require you to recreate or change all sObjects structures. But if you're creating a new project, you should create many_to_many relationships, as Diego mentioned.