VS2019 Warning NU1605 When open FlightPlanner.cs

Im using Visual Studio 2019 Version 16.11.8 and .NET Framework 4.6.1 SDK
I build code successfully, but when i open FlightPlanner.cs in design view, it shows warning like this

Warning NU1605 Detected package downgrade: SkiaSharp from 2.80.3 to 2.80.2. Reference the package directly from the project to select a different version.
MissionPlanner → SkiaSharp.NativeAssets.Linux.NoDependencies 2.80.3 → SkiaSharp (>= 2.80.3)
MissionPlanner → SkiaSharp (>= 2.80.2) MissionPlanner C:\Users\Me\MissionPlanner\MissionPlanner.csproj 1

Warning NU1605 Detected package downgrade: SSH.NET from 2020.0.2 to 2016.1.0. Reference the package directly from the project to select a different version.
MissionPlanner → solo → SSH.NET (>= 2020.0.2)
MissionPlanner → SSH.NET (>= 2016.1.0) MissionPlanner C:\Users\Me\MissionPlanner\MissionPlanner.csproj 1

How to fix this?