Error trying to remove certain presets
 

Hi,

I'm having trouble deleting or changing some of the presets in vBulletin 5. In the admin panel.

- Settings > Social Bookmarking Manager
I'm trying to DEselect all 4 social bookmarking sites that are pre-installed, so I uncheck them all (using "Toggle Active Status for All", or deselecting them one by one - doesn't matter). When I hit the Save button, I get a page that looks like the public template, but with an error message: "That action could not be completed. Please try again, and if this occurs again please contact the system administrator and tell them how you got this message."

- Channel Management > Forum Manager
Trying to delete Blog, Groups, and Special from the list of pre-set channels by selecting "Delete Channel" from the respective dropdowns. This leads to a page asking "are you sure?" I select "Yes" - and I get the same error message again (see above).

Deleting a forum that I have added previously (via the Site Builder) works, but I can't get rid of any of the preset channels.

Is there something I missed setting this up, or is this a bug?

Any help is appreciated. Thanks!