diff --git a/.changeset/tidy-weeks-provide.md b/.changeset/tidy-weeks-provide.md
new file mode 100644
index 000000000..6d1b269bb
--- /dev/null
+++ b/.changeset/tidy-weeks-provide.md
@@ -0,0 +1,5 @@
+---
+'@plait/core': patch
+---
+
+clone the duplicated content before inserting to resolve console error
diff --git a/packages/core/src/utils/fragment.ts b/packages/core/src/utils/fragment.ts
index 0487dd06f..055ef7d99 100644
--- a/packages/core/src/utils/fragment.ts
+++ b/packages/core/src/utils/fragment.ts
@@ -20,10 +20,12 @@ export const duplicateElements = (board: PlaitBoard, elements?: PlaitElement[])
     const selectedElements = elements || getSelectedElements(board);
     const rectangle = getRectangleByElements(board, selectedElements, false);
     const clipboardContext = board.buildFragment(null, rectangle, 'copy');
-    clipboardContext &&
+    const stringifiedContext = clipboardContext && JSON.stringify(clipboardContext);
+    const clonedContext = stringifiedContext && JSON.parse(stringifiedContext);
+    clonedContext &&
         board.insertFragment(
             {
-                ...clipboardContext,
+                ...clonedContext,
                 text: undefined
             },
             [rectangle.x + rectangle.width / 2, rectangle.y + rectangle.height / 2]