خطا بر روی هاست

سلام مهندس

من یک Api درست کردم که یک سری اطلاعات رو برام ارسال میکنه.

در همان لحظه یک Middleware نوشتم که درخواست ها لاگ بشن.

ولی بعد از این کار فقط بر روی هاست خطای زیر را میدهد:

{
        "ClassName": "System.InvalidOperationException",
        "Message": "A second operation started on this context before a previous operation completed. This is usually caused by different threads using the same instance of DbContext, however instance members are not guaranteed to be thread safe. This could also be caused by a nested query being evaluated on the client, if this is the case rewrite the query avoiding nested invocations.",
        "Data": null,
        "InnerException": null,
        "HelpURL": null,
        "StackTraceString": "   at Microsoft.EntityFrameworkCore.Internal.ConcurrencyDetector.EnterCriticalSection()\r\n   at Microsoft.EntityFrameworkCore.Internal.ConcurrencyDetector.EnterCriticalSectionAsync(CancellationToken cancellationToken)\r\n   at Microsoft.EntityFrameworkCore.Query.Internal.AsyncLinqOperatorProvider.ExceptionInterceptor`1.EnumeratorExceptionInterceptor.MoveNext(CancellationToken cancellationToken)\r\n   at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.ExecuteSingletonAsyncQuery[TResult](QueryContext queryContext, Func`2 compiledQuery, IDiagnosticsLogger`1 logger, Type contextType)\r\n   at PriceApi.Services.Services.User.IsExistUserByGuid(Guid userGuid) in F:\\Projects\\PriceApi\\PriceApi\\PriceApi.Services\\Services\\User.cs:line 29\r\n   at PriceApi.Web.Controllers.ArzController.ArzByCode(String CodeArz) in F:\\Projects\\PriceApi\\PriceApi\\PriceApi.Web\\Controllers\\ArzController.cs:line 51",
        "RemoteStackTraceString": null,
        "RemoteStackIndex": 0,
        "ExceptionMethod": null,
        "HResult": -2146233079,
        "Source": "Microsoft.EntityFrameworkCore",
        "WatsonBuckets": null
    }

ممنون میشم راهنمایی کنین.