When U share a file/folder with a group in the group sharing management into the admin console, You don't watch the dependencies and that may become a problem when you share a folder which is named as an existing one.
To better undertand the situation:
Imagine U have a template for a project. Every time You create a new project, You going to use the same template with the same structure. So, every time U share a folder with a group for a new project (i.e PURCHASE), U will watch a list of PURCHASE folders but no information from which project it is linked with.