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				@@ -223,8 +223,7 @@ 
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				     buildStageSelection(); 
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				-    const ORG_TOP_TREE_NODES = []; 
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				-    Object.assign(ORG_TOP_TREE_NODES, TOP_TREE_NODES); 
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				+    const ORG_TOP_TREE_NODES = JSON.parse(JSON.stringify(TOP_TREE_NODES)); 
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				     for (let item of TOP_TREE_NODES) { 
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				         item.items = JSON.parse(item.items); 
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				         if (item.items && item.items.length > 0) { 
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