I have a large assembly I'm working on and EVERY time I open it I get the message "..contains parts/or assemblies that are rolled back. Do you want to roll forward?"

I dont know why it keeps doing this. I have opened each subassembly in the model and NONE of them are "rolled back". There are no standalone parts in this model, just other subassemblies. This is starting to get really annoying. Why does SW keep saying I have rolled up parts when I confirmed there are none?

It does not even say which part/assy it suspects is rolled up so I cant examine it more closely.

Thanks for any pointers