Rendering Switch not possible

Hi,

I want to switch rendering from CSF to SSR as descibed in the thread "CSF - Upload of more than 2MB of Javascript".

When I want to switch the order of csfClient and htmlClient the entries cannot be edited neither in config- nor in admintool. I am in edit mode though (glasses-symbol switched to pencil-symbol) and the line seems to be editable but it just isn't.

What can be wrong here? My environment is Sneak Preview II

Regards

Michael