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				@@ -423,10 +423,10 @@ $(document).ready(() => { 
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				                 const parent = tree.getParent(node); 
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				                 const children = parent ? parent.children : tree.children; 
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				                 const index = children.indexOf(node); 
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				-                // if (index > 0 && children[index-1].used) { 
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				-                //     toastr.warning('其前节点已计量,选中的节点不可降级'); 
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				-                //     return; 
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				-                // } 
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				+                if (index > 0 && children[index-1].used) { 
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				+                    toastr.warning('其前节点已计量,选中的节点不可降级'); 
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				+                    return; 
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				+                } 
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				                 for (let i = index; i < count; i++) { 
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				                     const child = children[i+index]; 
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				                     if (tree.checkNodeUsed(child, pos)) { 
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