I'm trying to make a copy and rename a large list of parts/ assemblies. 

When I perform a pack and go, I have the ability to do both. However, 1 problem I'm facing is that assemblies and their drawings will show up multiple times, once as the original assembly with all the parts, but then again sometimes as a subcomponent of a part. 

I think this happens because of some assembly features (cut extrude, hole wizard, etc...) that was done at the assembly level and then carried down to the part. However, it makes it very difficult to keep track of what I had initially named it. 

Is there any feature that will get rid of all duplicate parts/ assemblies/ drawings on the list?

Thanks