Error NU1605Detected package downgrade: log4net from 2.0.11 to 2.0.3

I am using Visual Studio 2017 Enterprise version 15.9.27 and .NET Framework 4.5.

I just installed Windows 10 Update version 10.0.18363 build 18363.

I can compile all other projects in the Solution, but one of the project have yellow triangles on all the Dependencies (Assemblies and Nuget), including System, System.Core, System.Data.

When I tried to compile that one project, I am getting this error

Error   NU1605  Detected package downgrade: log4net from 2.0.11 to 2.0.3. Reference the package directly from the project to select a different version. 

When I tried to install log4net 2.0.11 thru Nuget Package Manager, I am getting this error

Error       Package restore failed. Rolling back package changes for '....'.                

I have "Clear All NuGet Cache(s)"The other projects have log4net 2.0.11

How can I fix this problem ?Thank you