diff --git a/Marco.Pms.Services/Controllers/MasterController.cs b/Marco.Pms.Services/Controllers/MasterController.cs
index 037db52..38ba783 100644
--- a/Marco.Pms.Services/Controllers/MasterController.cs
+++ b/Marco.Pms.Services/Controllers/MasterController.cs
@@ -105,45 +105,25 @@ namespace Marco.Pms.Services.Controllers
 
                 activity.ActivityName = createActivity.ActivityName;
                 activity.UnitOfMeasurement = createActivity.UnitOfMeasurement;
-                List<ActivityCheckList> activityCheckLists = await _context.ActivityCheckLists.AsNoTracking().Where(c => c.ActivityId == activity.Id).ToListAsync();
                 List<CheckListVM> checkListVM = new List<CheckListVM>();
 
                 if (createActivity.CheckList != null)
                 {
-                    var newCheckIds = createActivity.CheckList.Select(c => c.Id);
-                    List<ActivityCheckList> updateCheckList = new List<ActivityCheckList>();
-                    List<ActivityCheckList> deleteCheckList = new List<ActivityCheckList>();
-                    foreach (var check in activityCheckLists)
+                    List<ActivityCheckList> activityCheckList = new List<ActivityCheckList>();
+                    foreach (var check in createActivity.CheckList)
                     {
-                        if (newCheckIds.Contains(check.Id))
-                        {
-                            var updatedCheck = createActivity.CheckList.Find(c => c.Id == check.Id);
-                            ActivityCheckList checkList = updatedCheck.ToActivityCheckListFromCreateCheckListDto(tenantId, activity.Id);
-                            updateCheckList.Add(checkList);
-                        }
-                        else
-                        {
-                            deleteCheckList.Add(check);
-                        }
-                    }
-                    _context.ActivityCheckLists.UpdateRange(updateCheckList);
-                    if (deleteCheckList != null)
-                    {
-                        _context.ActivityCheckLists.RemoveRange(deleteCheckList);
+                        ActivityCheckList checkList = check.ToActivityCheckListFromCreateCheckListDto(tenantId, activity.Id);
+                        activityCheckList.Add(checkList);
                     }
+                    _context.ActivityCheckLists.UpdateRange(activityCheckList);
                     await _context.SaveChangesAsync();
 
-                    foreach (ActivityCheckList check in updateCheckList)
+                    foreach (ActivityCheckList check in activityCheckList)
                     {
                         var checkVM = check.ToCheckListVMFromActivityCheckList(activity.Id, false);
                         checkListVM.Add(checkVM);
                     }
                 }
-                else if (activityCheckLists != null)
-                {
-                    _context.ActivityCheckLists.RemoveRange(activityCheckLists);
-                    await _context.SaveChangesAsync();
-                }
                 ActivityVM activityVM = activity.ToActivityVMFromActivityMaster(checkListVM);
                 _logger.LogInfo("activity updated successfully from tenant {tenantId}", tenantId);
                 return Ok(ApiResponse<object>.SuccessResponse(activityVM, "activity updated successfully", 200));