Wiki sections can't accommodate this much text... How do I split content into two?

I've been using the Meeting Notes section in one of my MS Team channels to record daily agenda, summary and actions on a project running since Jan. Today I got a warning message pop up (see screenshot) which suggests splitting content into two. How do I do that? I've tried creating another channel within this Team and starting a new Wiki but I get the same message and now I can't add any more text to this Team (or Channel).