How to undo pressing Don't Trust on Apple Watch

I got the same message on my Apple Watch and responded "Don't Trust" since I had no idea what computer was trying to connect. Then I read this article so opened the Console app on my Mac. Initially it didn't show my Apple Watch under Devices. I think I had to connect my iPhone to my computer first before both my iPhone and Apple Watch showed up, the latter with an exclamation icon due to the "Don't Trust" response.

I disconnected my iPhone from my computer and restarted the iPhone. I then reconnected it to my computer to check the status in Console again. I got the "Trust this computer" prompt on my Apple Watch again. After responding "Trust" this time and entering my PIN, the warning icon disappeared in Console after a few moments.

It should be noted that there may be delays before the Apple Watch shows up in Console. I think opening Xcode seems to hasten the discovery process but I'm not sure. Also, I have yet to see any Apple Watch log entries in Console.

Unfortunately this is documented nowhere on Apple support documents so I wish you good luck in figuring this out.

There is an open Apple Community Forum discussion on this topic which you might want to contribute to and/or vote as of interest (https://discussions.apple.com/message/33472303) but given how rarely Apple employees actually contribute to these forums with official answers I would not hold my breath until an acceptable answer is posted for it.

1. Shutdown Xcode.

2. Disconnect iPhone from laptop

3. Power down iPhone.

4. Power down Apple Watch (press and hold crown and side button for about 10s)

5. Restart iPhone

6. Restart Apple Watch (press and release crown, Apple logo should appear)

7. Start up Xcode. Don't open your project just yet.

8. Attach phone to laptop

9. Xcode -> Windows -> Devices & Simulators

10. There should be a banner across the top of the D&S window indicating that the phone and/or phone and watch is/are getting ready for development. Wait for that to complete.

11. When complete, open your project and run on the watch.