In some situations, a content database that is used by Microsoft SharePoint Foundation may become corrupted. The corrupted ...

In some situations, a content database that is used by Microsoft SharePoint Foundation may become corrupted. The corrupted database may contain orphaned items. For example, a document may not have a parent document library or a list may not have a parent Microsoft SharePoint Foundation Web site.  Consequently, you may be unable to create new items with the same URL as the orphaned items, and space in the content database will be consumed unnecessarily.