FIPS hmac dracut error

I had the following error appear on a previously working FIPS enabled system:
dracut: FATAL: FIPS integrity test failed
dracut: Refusing to continue
dracut-pre-pivot[601]: Warning: /boot/.vmlinuz-3.10.0-x.x.x.el7.x86_64.hmac does not exist
Dracut: FATAL: FIPS integrity test failed

The system had been working and suddenly it started failing on the dracut error. I disabled fips in grub at boot. It looks like the boot partition pointer option in grub had the wrong UUID. Why would the UUIDhave changed?