The problem

I cannot mount a backup NFS share on my Synology box. I am able to access the Synology from other devices on the network. When trying to add network storage to Backup, I get the message

I have rebooted both HA and Synology without success. My NFS server maps all users to admin and allows all system on my local network, 192.168.0.0/16.

I have not been using Synology for backup for quite awhile but want to start using it again.

What version of Home Assistant Core has the issue?

core-2025.7.4

What was the last working version of Home Assistant Core?

core-2024.6.1

What type of installation are you running?

Home Assistant OS

Integration causing the issue

Backup

Link to integration documentation on our website

No response

Diagnostics information

See the error message below.

Example YAML snippet

Anything in the logs that might be useful for us?

Logger: homeassistant.components.hassio
Source: components/hassio/websocket_api.py:145
integration: Home Assistant Supervisor (documentation, issues)
First occurred: 3:48:19 PM (3 occurrences)
Last logged: 4:15:04 PM

Failed to to call /mounts - Could not unmount backup due to: Transaction for mnt-data-supervisor-mounts-backup.mount/stop is destructive (mnt-data-supervisor-mounts-backup.mount has 'start' job queued, but 'stop' is included in transaction).

Additional information

No response