By orphaned items I refer to items that have only Live version in the database for example. Check out the sf_content_items table in your database and you will see there are 2 versions of each item you have created. One is the Master and the other is the Live version of this item. The error is present when the Master version of some item is not present in the database.
In order to delete the orphaned item with our API please refer to this Documentation article:
It your specific case you need to pass the ID of the orphaned item in order to retrieve it and then delete it. You can get it from the database.
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Sitefinity CMS Ideas&Feedback Portal
and vote to affect the priority of the items