<p>When programs are persisted to DB, there can be duplicated entries, although the original list doesn't contain those entities.</p><p>The issue is tracked down to the EF object state tracking when using Object references to other entities.</p><p>See <a data-cke-saved-href="http://forum.team-mediaportal.com/threads/tve35-programs-get-duplicated-when-saved.123805" href="http://forum.team-mediaportal.com/threads/tve35-programs-get-duplicated-when-saved.123805">http://forum.team-mediaportal.com/threads/tve35-programs-get-duplicated-when-saved.123805&lt;/a&gt;&lt;/p&gt;&lt;div class="jeditor-sign" style="display:none;"><br /></div>