Windows 11 has swapped my C and D hard drives! It's now booting off my backup clone, causing files to end up on the wrong physical drive

[Microsoft Windows]

My Windows 11 machine has two internal drives. I had it setup (and it's been running fine for a year) with a 1TB HDD as disk 0 with the volume name "clone-backup) and an 1 TB SSD as disk 1 with volume name "boot-drive". The SSD drive 1 was the C: drive and the HDD drive 0 was the D: drive. Then, it looks like a few days ago something happened. The SSD which had been the boot drive and was assigned C: became D:. The HDD (disc 0) which had been D: was now the boot drive and changed from D: to C: The SSD (disc 1) which had been the boot drive and was C: was now D: and no longer the boot drive.I d

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