diff --git a/stock_reserve/models/stock_reserve.py b/stock_reserve/models/stock_reserve.py
index 5cef6e3e5..9edcaaf1d 100644
--- a/stock_reserve/models/stock_reserve.py
+++ b/stock_reserve/models/stock_reserve.py
@@ -122,8 +122,9 @@ class StockReservation(models.Model):
         A date until which the product is reserved can be specified.
         """
         self.write({"date_deadline": fields.Datetime.now()})
-        self.mapped("move_id")._action_confirm(merge=False)
-        self.mapped("move_id.picking_id").action_assign()
+        # Don't call _action_confirm() method to prevent assign picking
+        self.mapped("move_id").write({"state": "confirmed"})
+        self.mapped("move_id")._action_assign()
         return True
 
     def release_reserve(self):
@@ -132,8 +133,6 @@ class StockReservation(models.Model):
         """
         moves = self.mapped("move_id")
         moves._action_cancel()
-        # HACK: For avoiding to accumulate all reservations in the same picking
-        moves.write({"picking_id": False})
         return True
 
     def _get_state_domain_release_reserve(self, mode):
diff --git a/stock_reserve/tests/test_stock_reserve.py b/stock_reserve/tests/test_stock_reserve.py
index f7d1e91c2..dc73fb83f 100644
--- a/stock_reserve/tests/test_stock_reserve.py
+++ b/stock_reserve/tests/test_stock_reserve.py
@@ -33,9 +33,11 @@ class TestStockReserve(common.TransactionCase):
     def test_reservation_and_reservation_release(self):
         reservation_1 = self._create_stock_reservation(6)
         reservation_1.reserve()
+        self.assertFalse(reservation_1.picking_id)
         self.assertEqual(self.product.virtual_available, 4)
         reservation_2 = self._create_stock_reservation(1)
         reservation_2.reserve()
+        self.assertFalse(reservation_2.picking_id)
         self.assertEqual(self.product.virtual_available, 3)
         reservation_1.release_reserve()
         self.assertEqual(self.product.virtual_available, 9)
@@ -44,6 +46,7 @@ class TestStockReserve(common.TransactionCase):
         reservation_1 = self._create_stock_reservation(6)
         reservation_1.date_validity = fields.Date.from_string("2021-01-01")
         reservation_1.reserve()
+        self.assertFalse(reservation_1.picking_id)
         self.assertEqual(self.product.virtual_available, 4)
         cron = self.env.ref("stock_reserve.ir_cron_release_stock_reservation")
         cron.method_direct_trigger()
@@ -52,6 +55,7 @@ class TestStockReserve(common.TransactionCase):
     def test_cron_reserve(self):
         reservation_1 = self._create_stock_reservation(11)
         reservation_1.reserve()
+        self.assertFalse(reservation_1.picking_id)
         self.assertEqual(reservation_1.state, "partially_available")
         self.env["stock.quant"].create(
             {