Upgrading xcode 15 requires ios17 sdk to run, but updating this sdk gives 400 error
solution:
Go directly to the official website to download the developer backend to download the dmg file, and use the command line to quickly install it.
https://developer.apple.com/documentation/xcode/installing-additional-simulator-runtimes
xcode-select -s /Applications/Xcode-beta.app
xcodebuild -runFirstLaunch
xcrun simctl runtime add "~/Downloads/watchOS 9 beta Simulator Runtime.dmg"