Diesel

Seems like the app's DB is corrupted. It's trying to add a Polisy UUID during sync that already exists.
Delete Polisy in Settings | Controllers.
Then Add Controller - Local or Portal however you normally connect. Log back in and run Sync.

If you're not familiar or comfortable in SSH reach out to UDI for support.
Otherwise proceed at your own risk.....
SSH into Polisy using your current admin password.
ssh admin@<polisy-ip>
Stop IoX and PG3
sudo service isy stop
sudo service pg3 stop
Remove the entire IoX configuration (devices, programs, Z-Wave/Insteon data, certs, etc.)
sudo rm -rf /usr/local/isy
Remove all Polyglot / node server data
sudo rm -rf /var/polyglot
Remove portal credentials and association
sudo rm -rf /var/polyglot
Reset network settings back to default DHCP
sudo rm -f /etc/wpa_supplicant.conf
sudo rm -f /etc/network/interfaces
Reboot Polisy
sudo reboot
After factory reset credentials will default to admin/admin

At the very top of the page your OS version is indicate in the line below *** OS ***
What you posted is the UDX version.