diff --git a/PyPDF2/_writer.py b/PyPDF2/_writer.py
index 62d3094023..e4599bc746 100644
--- a/PyPDF2/_writer.py
+++ b/PyPDF2/_writer.py
@@ -913,16 +913,8 @@ def _sweep_indirect_references(
                 if newobj is None:
                     try:
                         newobj = data.pdf.get_object(data)
-                        hash_value = None
-                        if newobj is not None:
-                            hash_value = newobj.hash_value()
-                        # Check if object is already added to pdf.
-                        if hash_value in self._idnum_hash:
-                            return IndirectObject(self._idnum_hash[hash_value], 0, self)
                         self._objects.append(None)  # placeholder
                         idnum = len(self._objects)
-                        if hash_value is not None:
-                            self._idnum_hash[hash_value] = idnum
                         newobj_ido = IndirectObject(idnum, 0, self)
                         if data.pdf not in extern_map:
                             extern_map[data.pdf] = {}
diff --git a/resources/Seige_of_Vicksburg_Sample_OCR-crazyones-merged.pdf b/resources/Seige_of_Vicksburg_Sample_OCR-crazyones-merged.pdf
new file mode 100644
index 0000000000..aff79f1a4a
Binary files /dev/null and b/resources/Seige_of_Vicksburg_Sample_OCR-crazyones-merged.pdf differ
diff --git a/tests/test_workflows.py b/tests/test_workflows.py
index 8ad201b324..2d753382bb 100644
--- a/tests/test_workflows.py
+++ b/tests/test_workflows.py
@@ -244,6 +244,9 @@ def test_merge_with_warning(url, name):
     ):
         merger.write("tmp.merged.pdf")
 
+    # Cleanup
+    os.remove("tmp.merged.pdf")
+
 
 @pytest.mark.parametrize(
     ("url", "name"),
@@ -261,6 +264,9 @@ def test_merge(url, name):
     merger.append(reader)
     merger.write("tmp.merged.pdf")
 
+    # Cleanup
+    os.remove("tmp.merged.pdf")
+
 
 @pytest.mark.parametrize(
     ("url", "name"),
@@ -335,3 +341,26 @@ def test_scale_rectangle_indirect_object():
 
     for page in reader.pages:
         page.scale(sx=2, sy=3)
+
+
+def test_merge_output():
+    # Arrange
+    base = os.path.join(RESOURCE_ROOT, "Seige_of_Vicksburg_Sample_OCR.pdf")
+    crazy = os.path.join(RESOURCE_ROOT, "crazyones.pdf")
+    expected = os.path.join(
+        RESOURCE_ROOT, "Seige_of_Vicksburg_Sample_OCR-crazyones-merged.pdf"
+    )
+
+    # Act
+    merger = PdfMerger(strict=True)
+    with pytest.warns(PdfReadWarning):
+        merger.append(base)
+    merger.merge(1, crazy)
+    stream = BytesIO()
+    merger.write(stream)
+
+    # Assert
+    stream.seek(0)
+    with open(expected, "rb") as fp:
+        expected_data = fp.read()
+    assert stream.read() == expected_data