diff --git a/wp1/logic/move.py b/wp1/logic/move.py
index f2fdff6d..cecf2de0 100644
--- a/wp1/logic/move.py
+++ b/wp1/logic/move.py
@@ -33,6 +33,9 @@ def insert(wp10db, move):
         VALUES
           (%(m_timestamp)s, %(m_old_namespace)s, %(m_old_article)s,
            %(m_new_namespace)s, %(m_new_article)s)
+        ON DUPLICATE KEY UPDATE
+          m_new_namespace = %(m_new_namespace)s,
+          m_new_article = %(m_new_article)s
     """,
             attr.asdict(move),
         )
diff --git a/wp1/logic/move_test.py b/wp1/logic/move_test.py
new file mode 100644
index 00000000..b93db106
--- /dev/null
+++ b/wp1/logic/move_test.py
@@ -0,0 +1,51 @@
+import unittest
+
+from wp1.base_db_test import BaseWpOneDbTest
+from wp1.logic import move as logic_move
+from wp1.models.wp10.move import Move
+
+
+class LogicMoveTest(BaseWpOneDbTest):
+
+    def test_insert_duplicate_key_update(self):
+        # Insert initial data using raw SQL
+        with self.wp10db.cursor() as cursor:
+            cursor.execute(
+                """INSERT INTO moves
+                   (m_timestamp, m_old_namespace, m_old_article,
+                    m_new_namespace, m_new_article)
+                 VALUES (%s, %s, %s, %s, %s)""",
+                (
+                    b"20200101000000\x00\x00\x00\x00\x00\x00",
+                    0,
+                    b"Old_Article_1",
+                    0,
+                    b"New_Article_1",
+                ),
+            )
+        self.wp10db.commit()
+
+        # Insert duplicate row using the code under test
+        move2 = Move(
+            m_timestamp=b"20200101000000\x00\x00\x00\x00\x00\x00",
+            m_old_namespace=0,
+            m_old_article=b"Old_Article_1",
+            m_new_namespace=1,
+            m_new_article=b"Different_Article",
+        )
+        logic_move.insert(self.wp10db, move2)
+        self.wp10db.commit()
+
+        # Verify the record was updated, not duplicated
+        with self.wp10db.cursor() as cursor:
+            cursor.execute(
+                """SELECT * FROM moves
+                 WHERE m_timestamp = %s
+                   AND m_old_namespace = %s
+                   AND m_old_article = %s""",
+                (b"20200101000000\x00\x00\x00\x00\x00\x00", 0, b"Old_Article_1"),
+            )
+            updated_move = cursor.fetchone()
+        self.assertIsNotNone(updated_move)
+        self.assertEqual(updated_move["m_new_namespace"], 1)
+        self.assertEqual(updated_move["m_new_article"], b"Different_Article")