Yesterday, I was performing a database attach and upgrade from 2010 to 2013 SharePoint instances. I have done it previously without an issue but this time, I had to delete the prior application and recreate it (as a classic authentication application) before attaching and upgrading the database. The reason for that was being the current application was already converted to claims based authentication and when I first tried to attach the database from the 2010 “classic authentication” app, it was giving me an error. The classic authentication SharePoint site is currently a production site and we did not want to convert to claims BEFORE migration so I needed to create a classic authenticated app in SharePoint 2013.

After attempting to create the classic authentication application in SharePoint 2013, I received an error (this error will be discussing in another blog post). I tried deleting the web application and receive an error. It stated:

Sorry, something went wrong

An object of the type Microsoft.SharePoint.Administration.SPIisWebsiteUnprovisioningJobDefinition named “Unprovisioning (AppName)” already exists under the parent Microsoft.SharePoint.Administration.SPWebService named “”. Rename your object or delete the existing object.

To fix this issue, you just need to delete this one-time job from the Job definitions. After that (if non-production), do an iisreset just for good measure and then attempt to delete the application again. To get to the job definitions, go to Central Admin -> Monitoring -> Review Job Definitions. Ensure the view at the top right is selected to show “All” job definitions and search for “Unprovisioning Web Application (AppName)”

Click on it and choose DELETE.

I hope this post helps someone. If so, let me know in the comments below 🙂