Using prior root partition with fresh install

I accidentally deleted my boot partition…

I reinstalled Clear on the drive, creating fresh boot & root partitions, and kept the old root partition on the disk. I then removed the new root partition, leaving me with the fresh boot partition at the beginning of the disk followed immediately by my old root partition.

I know I need to make some other modifications to make this work but I’m not sure what they are. The machine does not currently boot in this state. Instead, I get several “ACPI error: AE_NOT_FOUND” errors, and then a fatal kernel error.

Can anyone help?