I know there is a document that states it is not possible. However, this should be possible.
The case: A project was calculated based on IFC models and PDF. A lot of documents where added to the acc project prior to the stage where actual design of the MEP parts where started by our company (pre-order).
Once the order came in, a Revit 2020 file was recieved and an over-eager employee saved it as cloudmodel in Revit 2024 (yep, new = better, and I know, user error...)
Now should that not be an issue we thought: just remove all 2024 Revit stuff and restart in 2022 (which was agreed on later with all party's).
No can do.... So now we have to make a new project for the building fase, which doesnt have all the documents, RFI, Issues, correspondence, forms, etc.... Two projects. Is this "Let's make things better"?
Product support just answers: not a product flaw. Put in an idea for a feature request.
Well, here it is (however I am still convinced it is an oversight in development not to be able to reset an ACC project when there is nothing in it from any Revit version as a cloud model).
Idea: when there are no cloud (workshared or not) Revit files left in an ACC project, it should be possible to reset the ACC project to an non-revit version ACC project.