Problem with archives, never happens to me slightly similarly – help please

Hello, first thank you.
I have created the post, have in the sidebar the wid with the list of Archives, have created a post and edit the year, I committed an error instead of putting 2007 put 200, well, now in the list of archives of the sidebar of the blog appears ‘ 200 ‘ also as year, edit the post I corrected it and put 2007, but the problem is that in the list of Archives ‘ 200 ‘ keeps on appearing, I have erased the post and keeping on appearing. Modify so that it shows me the year only of file then in the list of the sidebar they me appear: 2009, 2008, 2007 and the damned one 200, please heeeellllppp. Some suggestions to eliminate this year? Thanks please throw suggestions. I am going mad.