diff --git a/ConfectionaryListImplement/ImplementerStorage.cs b/ConfectionaryListImplement/ImplementerStorage.cs
index 7dbf4ab..12fb158 100644
--- a/ConfectionaryListImplement/ImplementerStorage.cs
+++ b/ConfectionaryListImplement/ImplementerStorage.cs
@@ -82,7 +82,14 @@ namespace ConfectioneryListImplement
 
 		public ImplementerViewModel? Insert(ImplementerBindingModel model)
 		{
-			model.Id = _source.Implementers.Count > 0 ? _source.Implementers.Max(x => x.Id) + 1 : 1;
+			model.Id = 1;
+			foreach (var implementer in _source.Implementers)
+			{
+				if (model.Id <= implementer.Id)
+				{
+					model.Id = implementer.Id + 1;
+				}
+			}
 			var res = Implementer.Create(model);
 			if (res != null)
 			{