diff --git a/ProgramManager/src/Application/GozareshgirProgramManager.Application/Modules/Projects/Commands/SetTimeProject/SetTimeProjectCommand.cs b/ProgramManager/src/Application/GozareshgirProgramManager.Application/Modules/Projects/Commands/SetTimeProject/SetTimeProjectCommand.cs
index b7ed7859..02f9c95c 100644
--- a/ProgramManager/src/Application/GozareshgirProgramManager.Application/Modules/Projects/Commands/SetTimeProject/SetTimeProjectCommand.cs
+++ b/ProgramManager/src/Application/GozareshgirProgramManager.Application/Modules/Projects/Commands/SetTimeProject/SetTimeProjectCommand.cs
@@ -12,6 +12,7 @@ public record SetTimeProjectCommand(
 
 public class SetTimeSectionTime
 {
+    public Guid? Id { get; set; }
     public string Description { get; set; }
     public int Hours { get; set; }
     public int Minutes { get; set; }
diff --git a/ProgramManager/src/Application/GozareshgirProgramManager.Application/Modules/Projects/Commands/SetTimeProject/SetTimeProjectCommandHandler.cs b/ProgramManager/src/Application/GozareshgirProgramManager.Application/Modules/Projects/Commands/SetTimeProject/SetTimeProjectCommandHandler.cs
index a9ca3a61..49f43a88 100644
--- a/ProgramManager/src/Application/GozareshgirProgramManager.Application/Modules/Projects/Commands/SetTimeProject/SetTimeProjectCommandHandler.cs
+++ b/ProgramManager/src/Application/GozareshgirProgramManager.Application/Modules/Projects/Commands/SetTimeProject/SetTimeProjectCommandHandler.cs
@@ -349,6 +349,15 @@ public class SetTimeProjectCommandHandler : IBaseCommandHandler<SetTimeProjectCo
         return OperationResult.Success();
     }
 
+    private void ValidateTotalTimeNotLessThanSpent(TimeSpan newTotalTime, TimeSpan currentTotalSpent)
+    {
+        if (newTotalTime < currentTotalSpent)
+        {
+            throw new BadRequestException(
+                $"تایم کل سکشن نمی‌تواند کمتر از زمان مصرف شده ({currentTotalSpent.TotalHours:F2} ساعت) باشد");
+        }
+    }
+
     private void SetSectionTime(TaskSection section, SetTimeProjectSkillItem sectionItem, long? addedByUserId)
     {
         var initData = sectionItem.InitData;
@@ -363,18 +372,69 @@ public class SetTimeProjectCommandHandler : IBaseCommandHandler<SetTimeProjectCo
         // تنظیم زمان اولیه
         section.UpdateInitialEstimatedHours(initialTime, initData.Description);
 
-        section.ClearAdditionalTimes();
-        // افزودن زمان‌های اضافی
-        bool hasAdditionalTime = false;
-        foreach (var additionalTime in sectionItem.AdditionalTime)
+        // مدیریت هوشمند زمان‌های اضافی
+        var existingAdditionalTimes = section.AdditionalTimes.ToList();
+        var incomingAdditionalTimes = sectionItem.AdditionalTime ?? [];
+        var currentTotalSpent = section.GetTotalTimeSpent();
+        
+        bool hasRealChange = false;
+
+        // حذف آیتم‌هایی که دیگر در لیست نیستند
+        foreach (var existingTime in existingAdditionalTimes)
         {
-            var additionalTimeSpan = TimeSpan.FromHours(additionalTime.Hours).Add(TimeSpan.FromMinutes(additionalTime.Minutes));
-            section.AddAdditionalTime(additionalTimeSpan, additionalTime.Description, addedByUserId);
-            hasAdditionalTime = true;
+            var stillExists = incomingAdditionalTimes.Any(x => x.Id == existingTime.Id);
+            if (!stillExists)
+            {
+                section.RemoveAdditionalTime(existingTime.Id);
+                hasRealChange = true;
+            }
+        }
+
+        // ویرایش یا اضافه کردن آیتم‌های جدید
+        foreach (var additionalTime in incomingAdditionalTimes)
+        {
+            var additionalTimeSpan = TimeSpan.FromHours(additionalTime.Hours)
+                .Add(TimeSpan.FromMinutes(additionalTime.Minutes));
+
+            if (additionalTimeSpan <= TimeSpan.Zero)
+                continue;
+
+            var existingAdditionalTime = existingAdditionalTimes.FirstOrDefault(x => x.Id == additionalTime.Id);
+            
+            if (existingAdditionalTime != null)
+            {
+                // اگر آیتم با این ID وجود دارد، بررسی کن اگر تغییر کرده باشد
+                if (existingAdditionalTime.HasChanged(additionalTimeSpan, additionalTime.Description))
+                {
+                    var newTotalTime = section.InitialEstimatedHours 
+                        .Add(existingAdditionalTimes
+                            .Where(x => x.Id != existingAdditionalTime.Id)
+                            .Aggregate(TimeSpan.Zero, (acc, x) => acc.Add(x.Hours))
+                            .Add(additionalTimeSpan));
+
+                    ValidateTotalTimeNotLessThanSpent(newTotalTime, currentTotalSpent);
+
+                    // ویرایش بدون حذف و ایجاد دوباره
+                    existingAdditionalTime.Update(additionalTimeSpan, additionalTime.Description);
+                    hasRealChange = true;
+                }
+            }
+            else
+            {
+                // اگر ID نداشت یا ID جدید بود، اضافه کن
+                if (additionalTime.Id == null || additionalTime.Id == Guid.Empty)
+                {
+                    var newTotalTime = section.FinalEstimatedHours.Add(additionalTimeSpan);
+                    ValidateTotalTimeNotLessThanSpent(newTotalTime, currentTotalSpent);
+
+                    section.AddAdditionalTime(additionalTimeSpan, additionalTime.Description, addedByUserId);
+                    hasRealChange = true;
+                }
+            }
         }
         
-        // تغییر status به Incomplete فقط اگر زمان اضافی اضافه شده باشد و در وضعیتی غیر از ReadyToStart باشد
-        if (hasAdditionalTime && section.Status != TaskSectionStatus.ReadyToStart)
+        // تغییر status به Incomplete فقط اگر تغییری واقعی اعمال شده باشد و در وضعیتی غیر از ReadyToStart باشد
+        if (hasRealChange && section.Status != TaskSectionStatus.ReadyToStart)
         {
             // اگر سکشن درحال انجام است، باید متوقف شود قبل از تغییر status
             if (section.Status == TaskSectionStatus.InProgress)
diff --git a/ProgramManager/src/Domain/GozareshgirProgramManager.Domain/ProjectAgg/Entities/TaskSectionAdditionalTime.cs b/ProgramManager/src/Domain/GozareshgirProgramManager.Domain/ProjectAgg/Entities/TaskSectionAdditionalTime.cs
index 657f76cc..e4cf303b 100644
--- a/ProgramManager/src/Domain/GozareshgirProgramManager.Domain/ProjectAgg/Entities/TaskSectionAdditionalTime.cs
+++ b/ProgramManager/src/Domain/GozareshgirProgramManager.Domain/ProjectAgg/Entities/TaskSectionAdditionalTime.cs
@@ -26,4 +26,15 @@ public class TaskSectionAdditionalTime : EntityBase<Guid>
     {
         Reason = reason;
     }
+
+    public void Update(TimeSpan hours, string? reason = null)
+    {
+        Hours = hours;
+        Reason = reason;
+    }
+
+    public bool HasChanged(TimeSpan newHours, string? newReason)
+    {
+        return Hours != newHours || Reason != newReason;
+    }
 }