ASP.NET Core app fails to start because of a not unique authentication scheme

Question

I have a ASP.NET Core app that uses to Azure AD sections in.

appsettings.json

"AzureAdInternal": {
    "Instance": "https://login.microsoftonline.com/",
    "Domain": "demo.example.com",
    "TenantId": "tenantId",
    "ClientId": "clientId",
    "ClientSecret": "clientSecret",
    "CallbackPath": "/signin-oidc"
  },
  "AzureAdExternal": {
    "Instance": "https://login.microsoftonline.com/",
    "Domain": "demo.example.com",
    "TenantId": "tenantId",
    "ClientId": "clientId",
    "ClientSecret": "clientSecret",
    "CallbackPath": "/signin-oidc"
},

Program.cs

// Multiple authentication (internal/external)
builder.Services.AddAuthentication(OpenIdConnectDefaults.AuthenticationScheme)
    .AddMicrosoftIdentityWebApp(builder.Configuration.GetSection(Configuration.AzureActiveDirectoryInternalIdentifier), 
    OpenIdConnectDefaults.AuthenticationScheme)
        .EnableTokenAcquisitionToCallDownstreamApi(initialScopes)
            .AddMicrosoftGraph(builder.Configuration.GetSection(Configuration.MicrosoftGraphIdentifier))
            .AddInMemoryTokenCaches();

builder.Services.AddAuthentication()
    .AddMicrosoftIdentityWebApp(builder.Configuration.GetSection(Configuration.AzureActiveDirectoryExternalIdentifier),
    "AzureAD", "cookiesAzureAD")
        .EnableTokenAcquisitionToCallDownstreamApi(initialScopes)
            .AddMicrosoftGraph(builder.Configuration.GetSection(Configuration.MicrosoftGraphIdentifier))
            .AddInMemoryTokenCaches();

Locally, it works but during the publishing process the app fails to start:

Application '/LM/W3SVC/1560967342/ROOT' with physical root 'C:\home\site\wwwroot\' hit unexpected managed exception, exception code = '0xe0434352'. First 30KB characters of captured stdout and stderr logs:
Unhandled exception. System.InvalidOperationException: Scheme already exists: AppServicesAuthentication
   at Microsoft.AspNetCore.Authentication.AuthenticationOptions.AddScheme(String name, Action`1 configureBuilder)
   at Microsoft.AspNetCore.Authentication.AuthenticationBuilder.<>c__DisplayClass4_0`2.<AddSchemeHelper>b__0(AuthenticationOptions o)
   at Microsoft.Extensions.Options.ConfigureNamedOptions`1.Configure(String name, TOptions options)
   at Microsoft.Extensions.Options.OptionsFactory`1.Create(String name)
   at Microsoft.Extensions.Options.UnnamedOptionsManager`1.get_Value()
   at Microsoft.AspNetCore.Authentication.AuthenticationSchemeProvider..ctor(IOptions`1 options, IDictionary`2 schemes)
   at Microsoft.AspNetCore.Authentication.AuthenticationSchemeProvider..ctor(IOptions`1 options)
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Span`1& arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
   at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitRootCache(ServiceCallSite callSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitRootCache(ServiceCallSite callSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.CreateServiceAccessor(Type serviceType)
   at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider)
   at Microsoft.AspNetCore.Builder.WebApplication.get_ServerFeatures()
   at Microsoft.AspNetCore.Builder.WebApplication..ctor(IHost host)
   at Microsoft.AspNetCore.Builder.WebApplicationBuilder.Build()

How can I solve this problem?

Many thanks for an answer.