On the same code branch we are successfully building on one machine, but on another we get this:

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> Error Multiple assemblies with equivalent identity have been imported: '...\src\packages\System.Xml.ReaderWriter.4.3.0\lib\net46\System.Xml.ReaderWriter.dll' and 'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.6.2\Facades\System.Xml.ReaderWriter.dll'. Remove one of the duplicate references. 
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How can we resolve?