OneNote doesn't syncronize, although there is space in my OneDrive

Hi, so I have a problem with syncing my OneNote. It displays a message saying that it cannot sync, because there is not enough space on my OneDrive. I press the message and it takes me to my OneDrive, which still has like 140 GB unused, so there's plenty of space. I recently changed which OneDrive account my pc synced stuff to. That's when my OneNote started having problems. I changed from hotmail, which I'm forced to have as a Windows user, to gmail, which I actually use. 

So it seems like my OneNote is still trying to sync with the hotmail OneDrive, which I no longer use, and indeed does not have enough space on it.

Any ideas for what I can do?