[5824][FIX] stock_move_actual_date: Prevent actual_date from being copied to backorders

stock_move_actual_date/models/stock_move.py

@@ -12,7 +12,8 @@ class StockMove(models.Model):
         store=True,
     )
     actual_date_source = fields.Date(
-        help="Technical field to store the actual_date of the source document."
+        copy=False,
+        help="Technical field to store the actual_date of the source document.",
     )
 
     def _get_timezone(self):
@@ -74,7 +75,7 @@ def _read_group(
         )
 
     def _action_done(self, cancel_backorder=False):
-        moves = super()._action_done(cancel_backorder)
+        moves = super()._action_done(cancel_backorder=cancel_backorder)
         # i.e. Inventory adjustments with actual date
         if self.env.context.get("force_period_date"):
             self.write({"actual_date_source": self.env.context["force_period_date"]})

stock_move_actual_date/models/stock_picking.py

@@ -14,3 +14,8 @@ def _get_actual_date_update_triggers(self):
     def _get_stock_moves(self):
         self.ensure_one()
         return self.move_ids
+
+    def _create_backorder(self, backorder_moves=None):
+        backorders = super()._create_backorder(backorder_moves=backorder_moves)
+        backorders.move_ids.filtered("actual_date_source").actual_date_source = False
+        return backorders

stock_move_actual_date/tests/test_stock_move_actual_date.py

@@ -40,7 +40,7 @@ def setUpClass(cls):
         cls.supplier_location = cls.env.ref("stock.stock_location_suppliers")
         cls.stock_location = cls.env.ref("stock.stock_location_stock")
 
-    def create_picking(self, actual_date=False):
+    def create_picking(self, actual_date=False, is_done=True):
         receipt = self.env["stock.picking"].create(
             {
                 "location_id": self.supplier_location.id,
@@ -72,8 +72,9 @@ def create_picking(self, actual_date=False):
             }
         )
         receipt.move_ids._action_confirm()
-        receipt.move_ids.picked = True
-        receipt.move_ids._action_done()
+        if is_done:
+            receipt.move_ids.picked = True
+            receipt.move_ids._action_done()
         return receipt, receipt.move_ids
 
     def create_scrap(self, receipt, actual_date=False):
@@ -207,3 +208,20 @@ def test_open_qty_at_actual_date(self):
         self.assertEqual(
             self.product_1.with_context(**action["context"]).qty_available, 10.0
         )
+
+    def test_backorder_picking_actual_date(self):
+        picking, move = self.create_picking(date(2025, 3, 10), is_done=False)
+        move.move_line_ids.quantity = 5.0
+        backorder_wizard_values = picking.button_validate()
+        backorder_wizard = (
+            self.env[(backorder_wizard_values.get("res_model"))]
+            .browse(backorder_wizard_values.get("res_id"))
+            .with_context(**backorder_wizard_values["context"])
+        )
+        backorder_wizard.process()
+        backorder = self.env["stock.picking"].search(
+            [("backorder_id", "=", picking.id)], limit=1
+        )
+        self.assertTrue(backorder, "Backorder picking should be created.")
+        self.assertFalse(backorder.actual_date)
+        self.assertFalse(backorder.move_ids.actual_date_source)