Changing menu name from Discussions to Discuss?

Hi SI Team

Have I finally gone absolutely bonkers or can I not change the menu name for the ED “Front Page Menu Layout” from Discussions to Discuss?

https://www.finalbug.net/discussions

Technically I can change the name in the Joomla back end but as soon as I attempt to save I can not save. I attempted to create a new “Front Page Menu Layout” and called it Discuss and could not save it either?

please advise

thanks
Paul