A route named 'MS_attributerouteWebApi' is already in the route c

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A route named 'MS_attributerouteWebApi' is already in the route collection. Route names must be unique.
Parameter name: name

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentException: A route named 'MS_attributerouteWebApi' is already in the route collection. Route names must be unique.
Parameter name: name

Source Error:

[No relevant source lines]

Source File: c:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\vs\d32108b6\ada22941\App_global.asax.1jtrchz-.0.cs Line: 0

Stack Trace:

[ArgumentException: A route named 'MS_attributerouteWebApi' is already in the route collection. Route names must be unique.
Parameter name: name]
   System.Web.Routing.RouteCollection.Add(String name, RouteBase item) +3173975
   System.Web.Http.WebHost.Routing.HostedHttpRouteCollection.Add(String name, IHttpRoute route) +30
   System.Web.Http.Routing.AttributeRoutingMapper.MapAttributeRoutes(HttpConfiguration configuration, IInlineConstraintResolver constraintResolver, IDirectRouteProvider directRouteProvider) +115
   System.Web.Http.HttpConfigurationExtensions.MapHttpAttributeRoutes(HttpConfiguration configuration) +57
   EPiServer.ServiceApi.IntegrationInitialization.b__0(HttpConfiguration config) +247
   System.Web.Http.GlobalConfiguration.Configure(Action`1 configurationCallback) +27
   EPiServer.ServiceApi.IntegrationInitialization.Initialize(InitializationEngine context) +133
   EPiServer.Framework.Initialization.<>c__DisplayClass5.b__4() +19
   EPiServer.Framework.Initialization.ModuleNode.Execute(Action a, String key) +43
   EPiServer.Framework.Initialization.ModuleNode.Initialize(InitializationEngine context) +80
   EPiServer.Framework.Initialization.InitializationEngine.InitializeModules() +173

[InitializationException: Initialize action failed for Initialize on class EPiServer.ServiceApi.IntegrationInitialization, EPiServer.ServiceApi, Version=2.0.1.59, Culture=neutral, PublicKeyToken=8fe83dea738b45b7]
   EPiServer.Framework.Initialization.InitializationEngine.InitializeModules() +439
   EPiServer.Framework.Initialization.InitializationEngine.Initialize(HostType hostType) +116
   EPiServer.Framework.Initialization.InitializationModule.Initialize(HostType hostType) +475
   EPiServer.Framework.Initialization.InitializationModule.FrameworkInitialization(HostType hostType) +83
   EPiServer.Global..ctor() +76
   EPiServer.Reference.Commerce.Site.Global..ctor() +29
   ASP.global_asax..ctor() in c:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\vs\d32108b6\ada22941\App_global.asax.1jtrchz-.0.cs:0

[TargetInvocationException: Exception has been thrown by the target of an invocation.]
   System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck) +0
   System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark) +119
   System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark) +232
   System.Activator.CreateInstance(Type type, Boolean nonPublic) +83
   System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, StackCrawlMark& stackMark) +1117
   System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) +124
   System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture) +20
   System.Web.HttpRuntime.CreateNonPublicInstance(Type type, Object[] args) +60
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +263
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +296

[HttpException (0x80004005): Exception has been thrown by the target of an invocation.]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +9923088
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +90
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +261

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.6.118.0

A route named 'MS_attributerouteWebApi' is already in the route collection. Route names must be unique. Parameter name: name

A route named 'MS_attributerouteWebApi' is already in the route collection. Route names must be unique.Parameter name: name

A route named 'MS_attributerouteWebApi' is already in the route collection. Route names must be unique.
Parameter name: name