diff --git a/StoryPresent/storypresent.cpp b/StoryPresent/storypresent.cpp
index f2616b2..7dccb43 100644
--- a/StoryPresent/storypresent.cpp
+++ b/StoryPresent/storypresent.cpp
@@ -122,10 +122,14 @@ void StoryPresent::nodeClickAccept(const QPointF& pos, const QString& node_name)
 			return;
 		}
 
-		QList<std::shared_ptr<IElementSlice>> parent_slices;
-		std::transform(refers.begin(), refers.end(), std::back_inserter(parent_slices),
+		QList<std::shared_ptr<IElementSlice>> vparent_slices;
+		std::transform(refers.begin(), refers.end(), std::back_inserter(vparent_slices),
 		[](std::shared_ptr<IElementSlice> ins) { return ins->parentSlice().lock(); });
 
+		QList<std::shared_ptr<IElementSlice>> parent_slices;
+		std::copy_if(vparent_slices.begin(), vparent_slices.end(), std::back_inserter(parent_slices),
+		[](std::shared_ptr<IElementSlice> ins) -> bool { return ins != nullptr; });
+
 		decltype(parent_slices) fliter_slices;
 		std::copy_if(parent_slices.begin(), parent_slices.end(), std::back_inserter(fliter_slices),
 		[](std::shared_ptr<IElementSlice> ins) { return ins->type() == SliceType::StoryDefines; });