umbraco navigation, node being displayed twice

I'm using the default xslt template for navigation, everything was working fine un开发者_如何学Ctil I tried to change the default url for a menu item. Then I deleted the Umbraco Url Name field, but the item keeps showing up twice on my web site. Even though it only shows up once in the backoffice. I unpublished it, and it only showed up once, when I publish it, it shows up twice. Any ideas why this is happening? Im using 4.5.2.

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Have you tried rebuilding the cache?

Right-click on the Content folder and select "Republish Entire Site"