Wordpress app Error on 9 months dormant Cloudron

[yusf]

On an instance I haven't looked at for a long while (9+ months) running a Wordpress app, the app has errored:

Unknown Error: removeVolume: Error removing volume of f24675d1-3fc0-461b-9863-520bd4156dff (HTTP code 500) server error - remove f24675d1-3fc0-461b-9863-520bd4156dff-localstorage: volume has active mounts

The system has managed to stay updated (Cloudron 4.4.4 currently) but no reboots has been performed up until now)