The current version of a model is the latest version in which the model properties
and file contents are editable. If you add a new model version manually or perform
an action that automatically creates a new model version (such as setting it as the
champion model or publishing a
champion model from the project level), a snapshot of the model’s contents is taken and a
version number is assigned. A new version is also created when you update a model
that is located within a folder. However, the contents of the new model version that
is created can no longer be edited. You can only view the contents of the new model
version. Model versions cannot be deleted.