Update script

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Editor/HDRenderPipelineMenuItems.cs

                 {
                     add.areaIntensity = l.intensity / LightUtils.calculateLineLightArea(1.0f, add.shapeWidth);
                 }
+            }
-                EditorUtility.SetDirty(add);
-            }
+            var scene = SceneManager.GetActiveScene();
+            EditorSceneManager.MarkSceneDirty(scene);
         }
 
         [MenuItem("Internal/HDRenderPipeline/Add \"Additional Light-shadow Data\" (if not present)")]