Cloning emmc pre installed W10 Enterprise to M.2 PCIE SSD

Hi, I purchased X86J4125 Odyssey - really pleased.

I subsequently purchased a Crucial NVMe 250G M.2 SSD
I cloned the existing OS on the emmc to the SSd using Acronis all went well.
However I am having trouble getting the Odyssey to boot from the SSD. In normal circumstances you would just remove the source drive but you cannot do this with the emmc. I have tried changing the boot priory in the bios but it still will not boot from the SSD.
Can anyone guide me on how to get the cloned OS to boot from the new SSD.

You can disable the emmc then force the board boot from SSD.