diff --git a/PrecastConcretePlant/PrecastConcretePlantDatabaseImplement/Implements/ShopStorage.cs b/PrecastConcretePlant/PrecastConcretePlantDatabaseImplement/Implements/ShopStorage.cs
index b694e88..aa72f38 100644
--- a/PrecastConcretePlant/PrecastConcretePlantDatabaseImplement/Implements/ShopStorage.cs
+++ b/PrecastConcretePlant/PrecastConcretePlantDatabaseImplement/Implements/ShopStorage.cs
@@ -72,25 +72,15 @@ namespace PrecastConcretePlantDatabaseImplement.Implements
         public ShopViewModel? Update(ShopBindingModel model)
         {
             using var context = new PrecastConcretePlantDataBase();
-            using var transaction = context.Database.BeginTransaction();
-            try
+            var shop = context.Shops.FirstOrDefault(x => x.Id == model.Id);
+            if (shop == null)
             {
-                var shop = context.Shops.FirstOrDefault(rec => rec.Id == model.Id);
-                if (shop == null)
-                {
-                    return null;
-                }
-                shop.Update(model);
-                context.SaveChanges();
-                shop.UpdateReinforcedies(context, model);
-                transaction.Commit();
-                return shop.GetViewModel;
-            }
-            catch
-            {
-                transaction.Rollback();
-                throw;
+                return null;
             }
+            shop.Update(model);
+            shop.UpdateReinforcedies(context, model);
+            context.SaveChanges();
+            return shop.GetViewModel;
         }
 
         public ShopViewModel? Delete(ShopBindingModel model)
diff --git a/PrecastConcretePlant/PrecastConcretePlantDatabaseImplement/Models/Shop.cs b/PrecastConcretePlant/PrecastConcretePlantDatabaseImplement/Models/Shop.cs
index 4b737e8..fd0ff89 100644
--- a/PrecastConcretePlant/PrecastConcretePlantDatabaseImplement/Models/Shop.cs
+++ b/PrecastConcretePlant/PrecastConcretePlantDatabaseImplement/Models/Shop.cs
@@ -58,10 +58,13 @@ namespace PrecastConcretePlantDatabaseImplement.Models
 
         public void Update(ShopBindingModel model)
         {
+            if (model == null)
+            {
+                return;
+            }
             Name = model.Name;
             Address = model.Address;
             DateOpening = model.DateOpening;
-            ReinforcedMaxCount = model.ReinforcedMaxCount;
         }
 
         public ShopViewModel GetViewModel => new()
@@ -76,30 +79,28 @@ namespace PrecastConcretePlantDatabaseImplement.Models
 
         public void UpdateReinforcedies(PrecastConcretePlantDataBase context, ShopBindingModel model)
         {
-            var shopReinforcedies = context.ShopReinforcedies.Where(rec => rec.ShopId == model.Id).ToList();
+            var shopReinforcedies = context.ShopReinforcedies
+                .Where(rec => rec.ShopId == model.Id)
+                .ToList();
             if (shopReinforcedies != null && shopReinforcedies.Count > 0)
-            {  
-                context.ShopReinforcedies.RemoveRange(shopReinforcedies.Where(rec => !model.ShopReinforcedies.ContainsKey(rec.ReinforcedId)));
-                context.SaveChanges();
-
-                foreach (var updateReinforced in shopReinforcedies)
+            {
+                context.ShopReinforcedies
+                    .RemoveRange(shopReinforcedies
+                    .Where(rec => !model.ShopReinforcedies
+                                        .ContainsKey(rec.ReinforcedId)));
+                foreach (var updateReinforced in shopReinforcedies.Where(x => model.ShopReinforcedies.ContainsKey(x.ReinforcedId)))
                 {
                     updateReinforced.Count = model.ShopReinforcedies[updateReinforced.ReinforcedId].Item2;
                     model.ShopReinforcedies.Remove(updateReinforced.ReinforcedId);
                 }
-                context.SaveChanges();
             }
-            var shop = context.Shops.First(x => x.Id == Id);
-            foreach (var st in model.ShopReinforcedies)
+            var shop = context.Shops.First(x => x.Id == model.Id);
+            shop.Reinforcedies.AddRange(model.ShopReinforcedies.Select(x => new ShopReinforced
             {
-                context.ShopReinforcedies.Add(new ShopReinforced
-                {
-                    Shop = shop,
-                    Reinforced = context.Reinforcedies.First(x => x.Id == st.Key),
-                    Count = st.Value.Item2
-                });
-                context.SaveChanges();
-            }
+                Reinforced = context.Reinforcedies.First(y => y.Id == x.Key),
+                Count = x.Value.Item2,
+            }).Except(shopReinforcedies ?? new()));
+            context.SaveChanges();
             _shopReinforcedies = null;
         }
     }