diff --git a/Marco.Pms.Services/Controllers/MasterController.cs b/Marco.Pms.Services/Controllers/MasterController.cs
index 037db52..b22acf0 100644
--- a/Marco.Pms.Services/Controllers/MasterController.cs
+++ b/Marco.Pms.Services/Controllers/MasterController.cs
@@ -110,9 +110,22 @@ namespace Marco.Pms.Services.Controllers
 
                 if (createActivity.CheckList != null)
                 {
+
                     var newCheckIds = createActivity.CheckList.Select(c => c.Id);
+
                     List<ActivityCheckList> updateCheckList = new List<ActivityCheckList>();
                     List<ActivityCheckList> deleteCheckList = new List<ActivityCheckList>();
+                    if (newCheckIds.Contains(0))
+                    {
+                        foreach (var check in createActivity.CheckList)
+                        {
+                            if (check.Id == 0)
+                            {
+                                ActivityCheckList checkList = check.ToActivityCheckListFromCreateCheckListDto(tenantId, activity.Id);
+                                updateCheckList.Add(checkList);
+                            }
+                        }
+                    }
                     foreach (var check in activityCheckLists)
                     {
                         if (newCheckIds.Contains(check.Id))