There are various issues when an user tries to restore a previous version of a content that has subcontent metadata, or content metadata (JCR reference).

• restoring previous version that has a subcontent
• restoring previous version, with current version containing a subcontent.
• restoring previous version with a content ref to another content that do not exists anymore
• etc...

Similarly, there might be related issue with archiving/unarchiving features.

The whole point of this issue is to test various scenario and identify the problematic cases.