If you select both View Model and related Source Model in New VDB dialog, created VDB has pending changes and is unable to save due to error:
java.lang.Exception: java.util.zip.ZipException: duplicate entry: <SourceModelName>
Related Source Models are automatically added during creation of VDB. The Problem occurs when you also manually add Source Model in New VDB dialog. The creation process doesn't recognize that it's the same model which is related to View Model.