Mapping OneNote Class Notebooks to New Class Team

Afternoon all,

I am having some trouble mapping an exsisting Class OneNote Notebook to a new Team that I have created for home learning. 

When picking the class the Error 'We ran into a problem. Please check if the notebook belongs to that class.' appears. I have tried using both the Windows 10 App and the Online Version. 

Any help would be really appreciated. Please see screenshot attached.

Thanks

Jason Davis