Strange situation with a superseded update

Hi all,

I have a strange situation with an superseded update. I maintain my sccm db and remove all  superseded updates. And now I have a problem. For all new xp x64 installations i discover that I required one security update (KB29009921) https://support.microsoft.com/en-us/kb/2909921. This update is no longer in my db because it was superseded by kb2936068 https://support.microsoft.com/en-ie/kb/2936068 and was removed. But the last one don't support any more XP!

How can I add again this update in my db and included in a SUG? In WSUS I've check and is still there.

Thanks.