XCode:“警告:输出文件的多个构建命令”，但如果我删除了副本，则会出现错误。

I get the errors:

我得到了错误:

Warning: Multiple build commands for output file /Users/me/Library/Developer/Xcode/DerivedData/myapp-csoyvdzaugzkszeagjrtzrfssudr/Build/Products/Debug-iphonesimulator/myapp.app/icon-72.png
Warning: Multiple build commands for output file /Users/me/Library/Developer/Xcode/DerivedData/myapp-csoyvdzaugzkszeagjrtzrfssudr/Build/Products/Debug-iphonesimulator/myapp.app/Default-Landscape@2x~ipad.png
Warning: Multiple build commands for output file /Users/me/Library/Developer/Xcode/DerivedData/myapp-csoyvdzaugzkszeagjrtzrfssudr/Build/Products/Debug-iphonesimulator/myapp.app/Default-Landscape~ipad.png
Warning: Multiple