There’s a new software update available for Apple Watch Series 6 and later starting today. watchOS 11.3 is the latest version, bringing the new Unity Rhythm watch face to Apple Watch.

the third major update to the operating system that runs on the Apple Watch. watchOS 11.3 is compatible with the Apple Watch Series 6 and later, all Apple Watch Ultra models, and the Apple Watch SE 2.

But the release also brought an unintended side effect: it caused software updates to break on older Apple Watch models. If they’re already running watchOS 10.6.1, which came out on August 19 ...