This maintenance release is available on the stable channel for appliances on the 0.8.6 line.
Maintenance follow-up to 0.8.6.14 — internal software package updates.
To upgrade:
sudo curl -fsSL https://get.calltelemetry.com | sudo sh -s -- update 0.8.6.15
For details, see docs.calltelemetry.com/troubleshoot/upgrade