So round one always fails. I have found that as soon as the bridge starts cycling white yellow during the update, the app reports the failure. If I wait for the bridge to return to a steady white light and immediately try the update again it will complete a successful round and report the updates complete. Not every speaker was ready for the second go around so the app will report updates are needed again. I can repeat once more to update any speaker that wasn't ready for the second round and this usually gets everyone updated and in sync. Why do I have to jump these hoops to get the new firmware?
Diagnostics Code: 131495260
Best answer by Stanley_4
Go to your router and set a static/reserved IP address for each Sonos device. Power down all the Sonos gear, reboot the router, reboot your controllers, power up a wired Sonos device or the wireless one closest to the router if there are no wired ones. At one minute intervals finish powering up the Sonos gear, wired first then wireless.
Go in and check for updates to make sure all are updated. Next update cycle should complete without issue.