/dev/root full on KVM vm HA install

I have a new install of Home assistant in a KVM vm. It was installed using the disk image haos_ova-9.5.qcow2. There are only a few addons (mosquitto, file manager, esphome, zigbee2mqtt) and no media installed.
Tracking down a different issue, I found the /dev/root partition (mounted on / ) of 200mb is full. I cant see a 200mb partition on the disk and my HA disk report shows only 10% used.

Could someone give me an idea on why this is occuring and how to solve it? 200mb seems minimal for a / partition, yet I cant find it, the smallest partion in fdisk is 256mb. At the very least I would like to clean it up somehow.

TIA

Home Assistant 2023.3.6
Supervisor 2023.03.2
Operating System 9.5
Frontend 20230309.1 - latest

It appears not to be an issue:

I have a couple of QEMU/KVM HomeAssistant installs and using df -hT both show /dev/root as full but I have no problems with them

Thank you, after much googling yesterday, I came to the same conclusion.
appreciate the response.