diff --git a/Pilz/Data/Json/JsonDataManager.cs b/Pilz/Data/Json/JsonDataManager.cs
index 7765779..7e92016 100644
--- a/Pilz/Data/Json/JsonDataManager.cs
+++ b/Pilz/Data/Json/JsonDataManager.cs
@@ -6,7 +6,9 @@ public class JsonDataManager(JsonDataContainer container) : DataManager
 
     protected override T? FindEntity<T>(int id) where T : class
     {
-        return container.Set<T>(false)?.FirstOrDefault(n => n.Id.Equals(id));
+        if (id == 0)
+            return null;
+        return container.Set<T>(false)?.FirstOrDefault(n => n.Id == id);
     }
 
     protected override IQueryable<T> GetEntitySet<T>()
diff --git a/Pilz/Pilz.csproj b/Pilz/Pilz.csproj
index 6fdeb05..f3657d8 100644
--- a/Pilz/Pilz.csproj
+++ b/Pilz/Pilz.csproj
@@ -5,7 +5,7 @@
     <LangVersion>latest</LangVersion>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>annotations</Nullable>
-    <Version>2.4.4</Version>
+    <Version>2.4.5</Version>
   </PropertyGroup>
   
   <ItemGroup>