How To: Resolve Upgrade Issues with Duplicate Content Types

Posted on: Aug 28th, 2012

How to: Resolve Upgrade Issues with Duplicate Content Types

By: Paul Beasley, Senior Network Solutions Architect   

During a recent SharePoint upgrade (WSS 3.0 to 2010), we ran into an issue with a duplicate content type. The upgrade error log looked like this:

[OWSTIMER] [SPSiteWssSequence2] [ERROR] [8/20/2012 1:14:53 AM]: Feature upgrade incomplete for Feature 'PublishingSite' (Id: 'f6924d36-2fa8-4f0b-b16d-06b7250180fa') in Site 'http://Server-shp1'. Exception: A duplicate content type name "Holiday" was found.

This error prevented the upgrade from completing.

 Checking the content types in the Site Content Type Gallery only displayed one entry:


So, how do we find the second copy? We can use SharePoint Manager 2010 (available here) to look at the full list of content types.

Open SharePoint Manager 2010 and browse to the web application being upgraded:


Expand Content Types and search for the duplicate entry:


Looking at the content type fields we could determine which one was customized and could be renamed. We renamed the new one ‘HolidayMod’ and refreshed the listing:


Re-running the upgrade on the SharePoint web application was now successful as there was no longer a duplicate content type.


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