Raspberry PI Imager - Home assistant OS 17.0 (yellow) 2026-01-19 Error - Unhealthy system - Duplicate Home Assistant OS installation

After using the Raspberry PI Imager to install a fresh instance of HA OS 17 Yellow on a new SDD I get the error message Unhealthy system - Duplicate Home Assistant OS installation.

The system does not allow me to restore my backups because of this nor install Addons or do most of the actions.
Has anyone an idea what it is and how it happened? Or how to repair it?