SharePoint 2007 to 2010 upgrade error: Duplicate content type name was found

I'm in the process of doing an upgrade from SharePoint 2007 to 2010 using the database attach method. During the database upgrade I'm getting the following error:

Feature upgrade incomplete for Feature 'PublishingSite' (Id: 'f6924d36-2fa8-4f0b-b16d-06b7250180fa') in Site 'http://intranet'. Exception: A duplicate content type name "Resource" was found
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I've had a look around and found two possible solutions, but I wanted to know if anyone has tried these and which one (if any) worked.

The first solution is from TechNet which suggests renaming the "Resource" content type as there is a name conflict with the new 2010 content types.

The second solution suggests deactivating the Publishing feature and deleting the "Relationship List" list.

I'm a bit nervous about trying them as both seem to have the potential to break the site.

Thanks

I ended up attaching the database to the Web Application and it turned out that the site still worked, except for some reporting services web parts. I replaced them with the latest version and all seems well.

I followed the Technet solution and changed the name of the content type. In my case, both were called "Resource", I changed one to "Group Resource" and everything was great after that.