All my IKEA lights stopped working within HA, but direct Zigbee2mqtt actions still work

This started happening a few days ago. Any ideas?

I’ve stopped Z2M, then Mosquitto, then started Mosquitto, then Z2M, same problem.

The error message in HA for all of my 70+ IKEA bulbs is:
This entity is no longer being provided by the mqtt integration. If the entity is no longer in use, delete it in settings.

Do you have any HA backups you could restore?