Hi, it is not possible to move versioned documents to another project, see CS184256. The project field cannot be added to 'Document Model' > 'Version Edit Fields'.
We were reorganizing a project into sub-projects, thats why I wanted to move some of the document (including the corresponding versions/revisions) into a new project. The live document can be moved to a new project, but the versioned documents cannot be moved. They must remain in their origin project forever, which makes it very unflexible.
I suggest to allow to change the project of versioned items as well.