diff --git a/Source/Engine/Level/Components/MissingScript.h b/Source/Engine/Level/Components/MissingScript.h
index bfb73498f..7b351bd82 100644
--- a/Source/Engine/Level/Components/MissingScript.h
+++ b/Source/Engine/Level/Components/MissingScript.h
@@ -42,24 +42,7 @@ public:
     /// <summary>
     /// Field for assigning new script to transfer data to.
     /// </summary>
-    API_PROPERTY() void SetReferenceScript(const ScriptingObjectReference<Script>& value)
-    {
-        _referenceScript = value;
-        if (Data.IsEmpty())
-            return;
-        rapidjson_flax::Document document;
-        document.Parse(Data.ToStringAnsi().GetText());
-
-        auto modifier = Cache::ISerializeModifier.Get();
-        _referenceScript->Deserialize(document, modifier.Value);
-
-        DeleteObject();
-    }
+    API_PROPERTY() void SetReferenceScript(const ScriptingObjectReference<Script>& value);
 };
 
-inline MissingScript::MissingScript(const SpawnParams& params)
-    : Script(params)
-{
-}
-
 #endif
diff --git a/Source/Engine/Level/SceneObjectsFactory.cpp b/Source/Engine/Level/SceneObjectsFactory.cpp
index 2936da3da..3022a649f 100644
--- a/Source/Engine/Level/SceneObjectsFactory.cpp
+++ b/Source/Engine/Level/SceneObjectsFactory.cpp
@@ -19,6 +19,28 @@
 #include "Engine/Threading/Threading.h"
 #endif
 
+MissingScript::MissingScript(const SpawnParams& params)
+    : Script(params)
+{
+}
+
+void MissingScript::SetReferenceScript(const ScriptingObjectReference<Script>& value)
+{
+    if (_referenceScript == value)
+        return;
+    _referenceScript = value;
+    if (Data.IsEmpty() || !_referenceScript)
+        return;
+    rapidjson_flax::Document document;
+    document.Parse(Data.ToStringAnsi().GetText());
+    auto modifier = Cache::ISerializeModifier.Get();
+    const auto idsMapping = Scripting::ObjectsLookupIdMapping.Get();
+    if (idsMapping)
+        modifier->IdsMapping = *idsMapping;
+    _referenceScript->Deserialize(document, modifier.Value);
+    DeleteObject();
+}
+
 SceneObjectsFactory::Context::Context(ISerializeModifier* modifier)
     : Modifier(modifier)
 {