diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Shared/Uns/UnsTree.razor b/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Shared/Uns/UnsTree.razor
index d0f08156..9deb928f 100644
--- a/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Shared/Uns/UnsTree.razor
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Shared/Uns/UnsTree.razor
@@ -35,7 +35,7 @@
     {
         var indent = $"padding-left:{depth * 18}px";
         var hasExpander = node.Children.Count > 0 || node.HasLazyChildren;
-        <div class="d-flex align-items-center gap-1 py-1" style="@indent">
+        <div @key="node.Key" class="d-flex align-items-center gap-1 py-1" style="@indent">
             @if (hasExpander)
             {
                 <button type="button" class="btn btn-sm btn-link p-0"