I am attempting to delete a child portal within my DNN 07.00.06 installation. I am signed in as host and deleted another portal successfully. However, with this portal, I receive the following error message:

The DELETE statement conflicted with the REFERENCE constraint "FK_UserDefinedData_UserDefinedFields". The conflict occurred in database "lakesidewebd", table "dbo.UserDefinedData", column 'UserDefinedFieldId'. The DELETE statement conflicted with the REFERENCE constraint "FK_Events_EventsCategory". The conflict occurred in database "lakesidewebd", table "dbo.Events", column 'Category'. The statement has been terminated. The statement has been terminated.

The domain has already been transferred to another hosting provider (not DNN) so the site is no longer available to me.

How can I delete this portal?

Thanks for the quick response Sebastian. This remedy is beyond me, however, since the site is now no longer accessible to me. The domain name has been used for a non-DNN site with another hosting provider. Is there another way to accomplish this?

Well still no joy here, but I did apply some advice from the previous post. Cannot move site as it is one of several sites within the portal. I did create a new child alias (site/child), logged into the site, and deleted everything. I don't know what has happened to the DNN recycle bin, but after deleting pages, I could not empty the recycle bin collectively. I had to select and delete each page individually. Anyway, after deleting all pages except home and having no content there, and then emptying the recycle bin, I still get the error message when I attempt to delete the site. And yes, I have recycled the app pool.