One or more field types are not installed properly. Go to List settings page to delete these fields. After Upgrading A SharePoint Site Collection From 2007 to 2010

SharePoint Is a fickle beast and moving from SharePoint 2007 to SharePoint 2010 has the potential to produce  the expected problems. I recently moved a SharePoint 2007 site collection to SharePoint 2010 by importing the 2007 database on the 2010 farm. I was stumped for a bit on an error that was unspecific and didn't really tell me what the problem was "One or more field types are not installed properly. Go to List settings page to delete these fields." This error was impacting the Pages library and popped up when any page in that library was loaded. No reference to a specific field type in the actual error displayed when I had custom errors disabled and no reference to the specific field in the ULS logs.