Currently, the iPhone's software update utility lists watchOS 3.1 as the most recent update for Apple Watches.
Users with bricked Apple Watches aren't able to reset their smartwatches, according to MacRumors. It's likely that replacement Apple Watches will be needed, as affected units display a red exclamation mark on the screen, which instructs them to visit Apple's website.
We have reached out to Apple for comment.
Apple released watchOS 3.1.1 earlier this week with bug fixes, alongside iOS 10.2.