Flutterでいじったらエラーが出現した話

あまり覚えていません。。。

Automatically signing iOS for device deployment using specified development team in Xcode project: T4BX68JSYA
Running pod install...                                              1.4s
Running Xcode build...                                                  
Xcode build done.                                            9.3s
Failed to build iOS app

Error output from Xcode build:
↳
    objc[12879]: Class AMSupportURLConnectionDelegate is implemented in both ?? (0x1eb0e27a0) and ?? (0x1296d02b8). One of the two will be used. Which one is undefined.
    objc[12879]: Class AMSupportURLSession is implemented in both ?? (0x1eb0e27f0) and ?? (0x1296d0308). One of the two will be used. Which one is undefined.
    ** BUILD FAILED **


Xcode's output:
↳
    1 error generated.
    note: Using new build system
    note: Building targets in parallel
    note: Planning build
    note: Constructing build description

Could not build the precompiled application for the device.

やったこと

flutter channel master
flutter upgrade --force

もう一度入れるのが良さそうですね。。