diff --git a/modules/purchase_trade/duplicate.py b/modules/purchase_trade/duplicate.py
index 26ad0ba..f62e9f1 100644
--- a/modules/purchase_trade/duplicate.py
+++ b/modules/purchase_trade/duplicate.py
@@ -151,6 +151,8 @@ class TradeCustomDuplicate(Wizard):
         line.quantity_theorical = options.quantity
         line.unit_price = options.unit_price
         line.price_type = options.price_type
+        if hasattr(line, 'finished'):
+            line.finished = False
         if hasattr(line, 'currency'):
             line.currency = options.currency
         if options.clear_fees and hasattr(line, 'fees'):
diff --git a/modules/purchase_trade/tests/test_module.py b/modules/purchase_trade/tests/test_module.py
index 70953ca..7c7eccb 100644
--- a/modules/purchase_trade/tests/test_module.py
+++ b/modules/purchase_trade/tests/test_module.py
@@ -6054,6 +6054,35 @@ class PurchaseTradeTestCase(ModuleTestCase):
         self.assertIsNone(
             ContractFactory._get_shipment_origin(ContractsStartMock()))
 
+    def test_custom_duplicate_resets_finished_line(self):
+        'custom duplicate keeps duplicated lots visible in lots management'
+        line = Mock(
+            product=Mock(),
+            quantity=None,
+            quantity_theorical=None,
+            unit_price=None,
+            price_type=None,
+            finished=True,
+            fees=[],
+            price_components=[],
+        )
+        record = Mock(lines=[line])
+        options = Mock(
+            quantity=Decimal('100'),
+            unit_price=Decimal('25'),
+            price_type='priced',
+            currency=Mock(),
+            clear_fees=False,
+            clear_pricing_components=False,
+        )
+        line.id = 1
+
+        duplicate_module.TradeCustomDuplicate._apply_line_options(
+            record, options)
+
+        self.assertFalse(line.finished)
+        line.save.assert_called_once()
+
     def test_custom_duplicate_creates_purchase_open_virtual_lot(self):
         'custom duplicate creates the purchase opening lot.qt explicitly'
         saved_lots = []