diff --git a/backend/src/Tnsu.ApprovalRoute.Api/Common/ApiResponse.cs b/backend/src/Tnsu.ApprovalRoute.Api/Common/ApiResponse.cs
index 36f539e..48561fe 100644
--- a/backend/src/Tnsu.ApprovalRoute.Api/Common/ApiResponse.cs
+++ b/backend/src/Tnsu.ApprovalRoute.Api/Common/ApiResponse.cs
@@ -1,5 +1,5 @@
 namespace Tnsu.ApprovalRoute.Api.Common;
 
-public sealed record ApiResponse<T>(T Data, IReadOnlyList<string> Warnings);
+public sealed record ApiResponse<T>(T Data);
 
 public sealed record ApiError(string Message);
diff --git a/backend/src/Tnsu.ApprovalRoute.Api/Common/ResultExtensions.cs b/backend/src/Tnsu.ApprovalRoute.Api/Common/ResultExtensions.cs
index 26c7bef..12ac8bb 100644
--- a/backend/src/Tnsu.ApprovalRoute.Api/Common/ResultExtensions.cs
+++ b/backend/src/Tnsu.ApprovalRoute.Api/Common/ResultExtensions.cs
@@ -11,8 +11,7 @@ public static class ResultExtensions
         if (result.IsFailed)
             return result.Errors[0].ToActionResult();
 
-        var warnings = result.Reasons.OfType<Warning>().Select(w => w.Message).ToList();
-        return new OkObjectResult(new ApiResponse<T>(result.Value, warnings));
+        return new OkObjectResult(new ApiResponse<T>(result.Value));
     }
 
     public static IActionResult ToActionResult(this Result result)
diff --git a/backend/src/Tnsu.ApprovalRoute.Application/Common/Errors/ApiErrors.cs b/backend/src/Tnsu.ApprovalRoute.Application/Common/Errors/ApiErrors.cs
index e9518c8..4285651 100644
--- a/backend/src/Tnsu.ApprovalRoute.Application/Common/Errors/ApiErrors.cs
+++ b/backend/src/Tnsu.ApprovalRoute.Application/Common/Errors/ApiErrors.cs
@@ -8,5 +8,3 @@ public sealed class NotFoundError(string entity, object id)
 public sealed class ValidationError(string message) : Error(message);
 
 public sealed class ConflictError(string message) : Error(message);
-
-public sealed class Warning(string message) : Success(message);
diff --git a/backend/src/Tnsu.ApprovalRoute.Application/TemplateRouteSteps/TemplateRouteStepDto.cs b/backend/src/Tnsu.ApprovalRoute.Application/TemplateRouteSteps/TemplateRouteStepDto.cs
index 6966de9..d24d5f0 100644
--- a/backend/src/Tnsu.ApprovalRoute.Application/TemplateRouteSteps/TemplateRouteStepDto.cs
+++ b/backend/src/Tnsu.ApprovalRoute.Application/TemplateRouteSteps/TemplateRouteStepDto.cs
@@ -11,7 +11,8 @@ public sealed record TemplateRouteStepDto(
     HeadType HeadType,
     RouteStepStatus Status,
     int RouteId,
-    bool AllowReassignToOtherApprovers);
+    bool AllowReassignToOtherApprovers,
+    string? Warning = null);
 
 public sealed record CreateTemplateRouteStepRequest(
     int OrderNo,
diff --git a/backend/src/Tnsu.ApprovalRoute.Application/TemplateRouteSteps/TemplateRouteStepService.cs b/backend/src/Tnsu.ApprovalRoute.Application/TemplateRouteSteps/TemplateRouteStepService.cs
index 244c35b..9e1f094 100644
--- a/backend/src/Tnsu.ApprovalRoute.Application/TemplateRouteSteps/TemplateRouteStepService.cs
+++ b/backend/src/Tnsu.ApprovalRoute.Application/TemplateRouteSteps/TemplateRouteStepService.cs
@@ -55,8 +55,7 @@ public sealed class TemplateRouteStepService(ApprovalRouteDbContext db)
         db.TemplateRouteSteps.Add(entity);
         await db.SaveChangesAsync(cancellationToken);
 
-        var result = Result.Ok(ToDto(entity));
-        return await AppendMissingProjectRoleWarningAsync(route, result, cancellationToken);
+        return Result.Ok(await ToDtoWithWarningAsync(entity, route, cancellationToken));
     }
 
     public async Task<Result<TemplateRouteStepDto>> UpdateAsync(
@@ -83,8 +82,7 @@ public sealed class TemplateRouteStepService(ApprovalRouteDbContext db)
         entity.AllowReassignToOtherApprovers = r.AllowReassignToOtherApprovers;
         await db.SaveChangesAsync(cancellationToken);
 
-        var result = Result.Ok(ToDto(entity));
-        return await AppendMissingProjectRoleWarningAsync(route, result, cancellationToken);
+        return Result.Ok(await ToDtoWithWarningAsync(entity, route, cancellationToken));
     }
 
     public async Task<Result> DeleteAsync(int routeId, int id, CancellationToken cancellationToken)
@@ -99,18 +97,20 @@ public sealed class TemplateRouteStepService(ApprovalRouteDbContext db)
         return Result.Ok();
     }
 
-    private async Task<Result<TemplateRouteStepDto>> AppendMissingProjectRoleWarningAsync(
-        TemplateRoute route, Result<TemplateRouteStepDto> result, CancellationToken cancellationToken)
+    // Для маршрута «по проекту» без единого шага с ролью в проекте DTO несёт предупреждение в поле Warning.
+    private async Task<TemplateRouteStepDto> ToDtoWithWarningAsync(
+        TemplateRouteStep entity, TemplateRoute route, CancellationToken cancellationToken)
     {
-        if (!route.ByProject)
-            return result;
+        string? warning = null;
+        if (route.ByProject)
+        {
+            var hasProjectRoleStep = await db.TemplateRouteSteps
+                .AnyAsync(x => x.RouteId == route.Id && x.ProjectRole != ProjectRole.None, cancellationToken);
+            if (!hasProjectRoleStep)
+                warning = "Должен быть хотя бы один шаг с ролью в проекте.";
+        }
 
-        var hasProjectRoleStep = await db.TemplateRouteSteps
-            .AnyAsync(x => x.RouteId == route.Id && x.ProjectRole != ProjectRole.None, cancellationToken);
-
-        return hasProjectRoleStep
-            ? result
-            : result.WithReason(new Warning("Должен быть хотя бы один шаг с ролью в проекте."));
+        return ToDto(entity) with { Warning = warning };
     }
 
     private static TemplateRouteStepDto ToDto(TemplateRouteStep e) => new(
diff --git a/backend/tests/Tnsu.ApprovalRoute.IntegrationTests/ApplicationServices/TemplateRouteStepServiceTests.cs b/backend/tests/Tnsu.ApprovalRoute.IntegrationTests/ApplicationServices/TemplateRouteStepServiceTests.cs
index 16c56ee..a090faa 100644
--- a/backend/tests/Tnsu.ApprovalRoute.IntegrationTests/ApplicationServices/TemplateRouteStepServiceTests.cs
+++ b/backend/tests/Tnsu.ApprovalRoute.IntegrationTests/ApplicationServices/TemplateRouteStepServiceTests.cs
@@ -99,7 +99,8 @@ public sealed class TemplateRouteStepServiceTests : IClassFixture<PostgresDataba
 
         // Assert
         created.IsSuccess.ShouldBeTrue();
-        created.Reasons.ShouldContain(r => r.Message.Contains("ролью в проекте"));
+        created.Value.Warning.ShouldNotBeNull();
+        created.Value.Warning.ShouldContain("ролью в проекте");
     }
 
     [Fact(DisplayName = "Создание шага с ролью в проекте на маршруте «по проекту» не возвращает предупреждение")]
@@ -116,7 +117,7 @@ public sealed class TemplateRouteStepServiceTests : IClassFixture<PostgresDataba
 
         // Assert
         created.IsSuccess.ShouldBeTrue();
-        created.Reasons.ShouldBeEmpty();
+        created.Value.Warning.ShouldBeNull();
     }
 
     [Fact(DisplayName = "Обновление шага маршрута изменяет исполнителя, статус и разрешение на переназначение")]