現象①xcode 10 で実機のビルドが通らなくなった

iOSの実機で動作確認しようとしたら突然以下のエラーが出ました＞＜

a valid provisioning profile for this executable was not found. xcode 10

現象②provisioning settingsがコンフリクトした

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:-1: [App名] has conflicting provisioning settings. [App名] is automatically signed for development, but a conflicting code signing identity iPhone Distribution has been manually specified. Set the code signing identity value to "iPhone Developer" in the build settings editor, or switch to manual signing in the project editor. (in target '[App名]')

解決策

Xcode > File > Project Setting... で、Shared Project Settings: の Build System を「Legacy Build System」に変更したら無事に実行できました。