มัน error duplicate 'assembly version' attribute แบบนี้คือมันผิดตรงไหนครับ

using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;


[assembly: AssemblyTitle("TwainGui")]
[assembly: AssemblyDescription("")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("")]
[assembly: AssemblyProduct("TwainGui")]
[assembly: AssemblyCopyright("Copyright ©  2013")]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyCulture("")]


[assembly: ComVisible(false)]

[assembly: Guid("d9b93a34-57fe-4a9f-a549-b0bddad4e8a1")]


[assembly: AssemblyVersion("1.0.0.0")]
[assembly: AssemblyFileVersion("1.0.0.0")]