SqlServerValueGenerationStrategy does not exist

Even i thought downloaded Microsoft.EntityFrameworkCore.SqlServer version 3.1.15 still keepinig

The name 'SqlServerValueGenerationStrategy' does not exist in the current context   ATSActionMonitoringSystem   D:\USERS\ERENT\Desktop\ATSSapanca2022\ATSActionMonitoringSystem\Migrations\20210928071457_MigrationAddKategoryDeptID.Designer.cs    23  N/A

Already tried :

Install-Package Microsoft.EntityFrameworkCore.SqlServer

Its look like installed and defined my .csproj file.

<Project Sdk="Microsoft.NET.Sdk.Web"><PropertyGroup><TargetFramework>netcoreapp3.1</TargetFramework><CopyRefAssembliesToPublishDirectory>false</CopyRefAssembliesToPublishDirectory></PropertyGroup><ItemGroup><PackageReference Include="MailKit" Version="2.11.1" /><PackageReference Include="Microsoft.AspNetCore.Identity" Version="2.2.0" /><PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="3.1.5" /><PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="3.1.15" /><PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="3.1.15" /><PackageReference Include="NLog.Extensions.Logging" Version="1.6.0" /><PackageReference Include="Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation" Version="3.1.4" /><PackageReference Include="Microsoft.Bcl.HashCode" Version="1.1.1" /><PackageReference Include="Microsoft.EntityFrameworkCore" Version="3.1.15" /><PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="3.1.15"><PrivateAssets>all</PrivateAssets><IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets></PackageReference><PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="3.1.15"><PrivateAssets>all</PrivateAssets><IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets></PackageReference><PackageReference Include="Microsoft.Extensions.Identity.Core" Version="3.1.15" /><PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration" Version="3.1.5" /><PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="3.1.5" /><PackageReference Include="Microsoft.VisualStudio.Web.CodeGenerators.Mvc" Version="3.1.5" /><PackageReference Include="NLog" Version="4.6.7" /><PackageReference Include="NLog.Web.AspNetCore" Version="4.14.0" /><PackageReference Include="Novell.Directory.Ldap.NETStandard" Version="3.6.0" /></ItemGroup><ItemGroup><Content Update="nlog.config" CopyToOutputDirectory="PreserveNewest" /></ItemGroup></Project>

Do you have any ideas to help?