Update Management Center (Preview) - Deleted Maintenance Configurations

Hi,

We are testing out the Update Management Center (Preview) and we're playing around with the Maintenance Configurations, however, when we have deleted the once we don't need anymore, we never removed the associated machines first and now these are still showing as having the Maintenance Configurations assigned despite it already being deleted.

We tried re-creating with the same name and whilst the machines do show in the list when we try and remove we get the following error

Any help would be appreciated

Thanks