Help needed with overgrown adansonii

Hi everyone. I need a bit of help and advice with this Adansonii.

I had chopped and propped it around a year ago and decided to plant roughly 20 individual rooted plants in a wide hanging pot. I had it facing in a north, north east facing window. Somehow I only managed to notice now there is one of them who managed to grow way bigger than the rest, the rest are as I expected.

This one is around a meter long with quite a thick stalk and I have no idea what to do with it.

Do I just cut it back? I feel so bad cutting such a big and healthy growth as I don't have space to put it.

Also I know this is a climbing and not hanging plant, this was an experiment that turned out better than expected.

Thanks for any advice.