M2_1 nvme drive disappeared after 14600k install

Hi, just successfully installed a 14600k upgrade on my MSI Gaming Pro DDR4 board, only to find the M2_1 slot is now not recognised and is empty.

I’ve checked the actual nvme and it’s fine - works in slot M2_2 but it has all my games on!

Has my 14th gen installation somehow disabled the first m2 slot? And if so how can I get it back?

Bios up to date, completely out of other ideas!

Thanks