diff --git a/apps/client/src/widgets/collections/board/data.spec.ts b/apps/client/src/widgets/collections/board/data.spec.ts
new file mode 100644
index 000000000..357aea616
--- /dev/null
+++ b/apps/client/src/widgets/collections/board/data.spec.ts
@@ -0,0 +1,32 @@
+import { it, describe, expect } from "vitest";
+import { buildNote } from "../../../test/easy-froca";
+import { getBoardData } from "./data";
+import FBranch from "../../../entities/fbranch";
+import froca from "../../../services/froca";
+
+describe("Board data", () => {
+    it("deduplicates cloned notes", async () => {
+        const parentNote = buildNote({
+            title: "Board",
+            "#collection": "",
+            "#viewType": "board",
+            children: [
+                { id: "note1", title: "First note", "#status": "To Do" },
+                { id: "note2", title: "Second note", "#status": "In progress" },
+                { id: "note3", title: "Third note", "#status": "Done" }
+            ]
+        });
+        const branch = new FBranch(froca, {
+            branchId: "note1_note2",
+            notePosition: 10,
+            fromSearchNote: false,
+            noteId: "note2",
+            parentNoteId: "note1"
+        });
+        froca.branches["note1_note2"] = branch;
+        froca.getNoteFromCache("note1").addChild("note2", "note1_note2", false);
+        const data = await getBoardData(parentNote, "status", {}, false);
+        const noteIds = Array.from(data.byColumn.values()).flat().map(item => item.note.noteId);
+        expect(noteIds.length).toBe(3);
+    });
+});
diff --git a/apps/client/src/widgets/collections/board/data.ts b/apps/client/src/widgets/collections/board/data.ts
index db315564a..f283e2dc7 100644
--- a/apps/client/src/widgets/collections/board/data.ts
+++ b/apps/client/src/widgets/collections/board/data.ts
@@ -11,7 +11,7 @@ export async function getBoardData(parentNote: FNote, groupByColumn: string, per
     const byColumn: ColumnMap = new Map();
 
     // First, scan all notes to find what columns actually exist
-    await recursiveGroupBy(parentNote.getChildBranches(), byColumn, groupByColumn, includeArchived);
+    await recursiveGroupBy(parentNote.getChildBranches(), byColumn, groupByColumn, includeArchived, new Set<string>());
 
     // Get all columns that exist in the notes
     const columnsFromNotes = [...byColumn.keys()];
@@ -61,26 +61,28 @@ export async function getBoardData(parentNote: FNote, groupByColumn: string, per
     };
 }
 
-async function recursiveGroupBy(branches: FBranch[], byColumn: ColumnMap, groupByColumn: string, includeArchived: boolean) {
+async function recursiveGroupBy(branches: FBranch[], byColumn: ColumnMap, groupByColumn: string, includeArchived: boolean, seenNoteIds: Set<string>) {
     for (const branch of branches) {
         const note = await branch.getNote();
         if (!note || (!includeArchived && note.isArchived)) continue;
 
         if (note.type !== "search" && note.hasChildren()) {
-            await recursiveGroupBy(note.getChildBranches(), byColumn, groupByColumn, includeArchived);
+            await recursiveGroupBy(note.getChildBranches(), byColumn, groupByColumn, includeArchived, seenNoteIds);
         }
 
         const group = note.getLabelValue(groupByColumn);
-        if (!group) {
+        if (!group || seenNoteIds.has(note.noteId)) {
             continue;
         }
 
         if (!byColumn.has(group)) {
             byColumn.set(group, []);
         }
+
         byColumn.get(group)!.push({
             branch,
             note
         });
+        seenNoteIds.add(note.noteId);
     }
 }