diff --git a/website/docs/en-US/tree.md b/website/docs/en-US/tree.md
index 59273c3e23..8e6256510f 100644
--- a/website/docs/en-US/tree.md
+++ b/website/docs/en-US/tree.md
@@ -481,7 +481,6 @@ The content of tree nodes can be customized, so you can add icons or buttons as
       }];
       return {
         data: JSON.parse(JSON.stringify(data)),
-        data: JSON.parse(JSON.stringify(data))
       }
     },
 
diff --git a/website/docs/es/tree.md b/website/docs/es/tree.md
index 62a414c2aa..3922493fde 100644
--- a/website/docs/es/tree.md
+++ b/website/docs/es/tree.md
@@ -481,7 +481,6 @@ El contenido de los nodos puede ser personalizado, así que puede añadir iconos
       }];
       return {
         data: JSON.parse(JSON.stringify(data)),
-        data: JSON.parse(JSON.stringify(data))
       }
     },
 
diff --git a/website/docs/fr-FR/tree.md b/website/docs/fr-FR/tree.md
index dda9f3d77f..175bc9f5a1 100644
--- a/website/docs/fr-FR/tree.md
+++ b/website/docs/fr-FR/tree.md
@@ -483,7 +483,6 @@ Le contenu des noeuds peut être personnalisé, afin de pouvoir ajouter des icô
       }];
       return {
         data: JSON.parse(JSON.stringify(data)),
-        data: JSON.parse(JSON.stringify(data))
       }
     },
 
diff --git a/website/docs/zh-CN/tree.md b/website/docs/zh-CN/tree.md
index 25a84642ea..0ad37de16d 100644
--- a/website/docs/zh-CN/tree.md
+++ b/website/docs/zh-CN/tree.md
@@ -481,7 +481,6 @@
       }];
       return {
         data: JSON.parse(JSON.stringify(data)),
-        data: JSON.parse(JSON.stringify(data))
       }
     },