I am updating components in one project from 13.2 --> 2020.1  Run Version Utility made sure no old dll in bin, run in VS2019 .. all works.. 

After deployment to the server  it blows up with the following .... please advise how to resolve (clear ) this issue.

Thanks.

Compilation Error

Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: CS0433: The type 'Infragistics.Web.UI.Framework.DisabledImageButton' exists in both 'c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\0bc91cf1\5fed1842\assembly\dl3\b4538920\b00b5325_038dd601\Infragistics45.Web.v13.2.DLL' and 'c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\0bc91cf1\5fed1842\assembly\dl3\64ce5ab1\00532b7f_bc4fd601\Infragistics45.Web.v20.1.DLL'