Problem: In SharePoint 2010, I created a new site template from an existing site and a new site using this template. After deleting the new site and I cannot deactivate the site template to be able to remove it. Here's the exception I get:
System.ArgumentException: Value does not fall within the expected range. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Stack Trace: [ArgumentException: Value does not fall within the expected range.] Microsoft.SharePoint.SPWebCollection.get_Item(Guid id) +27763375 Microsoft.SharePoint.SPFeatureEnumeratorBase.GetCachedWeb(SPSite site, Guid webId, Guid featureId) +252 [SPFeatureIsOrphanedException: Unable to access web scoped feature (Id: 5c143ca0-e513-4fa5-93a6-a926352c982e) because it references a non-existent or broken web (Id: 196cdf6e-d4a1-4cb6-b962-591aaa3c5f43) on site 'http://win-9o8m2cks1v7'. Exception: System.ArgumentException: Value does not fall within the expected range. at Microsoft.SharePoint.SPWebCollection.get_Item(Guid id)
Solution: Go to the Site Settings page for the root web of your site collection. Under the heading Site Collection Administration, click the Recycle bin link. On the QuickLaunch menu, select End User Recycle Bin items, then select all the items that appear and click the Delete Selection link at the top of the items list. Now select Deleted From End User Recycle Bin from the QuickLaunch Menu and do the same.
Now return to the solution gallery and you should be able to deactivate and delete your solution.