diff --git a/addons/event_sale/models/event_event.py b/addons/event_sale/models/event_event.py
index cdb2cc3558f..4ab99bbe0ab 100644
--- a/addons/event_sale/models/event_event.py
+++ b/addons/event_sale/models/event_event.py
@@ -32,21 +32,22 @@ class Event(models.Model):
         we sell a single event ticket). """
         date_now = fields.Datetime.now()
         event_subtotals = self.env['sale.order.line']._read_group(
-            [('event_id', 'in', self.ids),
-                ('price_subtotal', '!=', 0)],
+            [('event_id', 'in', self.ids), ('price_subtotal', '!=', 0)],
             ['event_id', 'currency_id'],
             ['price_subtotal:sum'],
         )
-
-        self.sale_price_subtotal = 0
+        event_subtotals_mapping = dict.fromkeys(self._origin, 0)
         for event, currency, sum_price_subtotal in event_subtotals:
-            event.sale_price_subtotal += event.currency_id._convert(
+            event_subtotals_mapping[event] += event.currency_id._convert(
                 sum_price_subtotal,
                 currency,
                 event.company_id or self.env.company,
                 date_now,
             )
 
+        for event in self:
+            event.sale_price_subtotal = event_subtotals_mapping.get(event._origin, 0)
+
     def action_view_linked_orders(self):
         """ Redirects to the orders linked to the current events """
         sale_order_action = self.env["ir.actions.actions"]._for_xml_id("sale.action_orders")
diff --git a/addons/stock/models/product.py b/addons/stock/models/product.py
index 3e816836b5f..acc3d8e6523 100644
--- a/addons/stock/models/product.py
+++ b/addons/stock/models/product.py
@@ -393,12 +393,13 @@ class Product(models.Model):
         return list(product_ids)
 
     def _compute_nbr_reordering_rules(self):
-        self.nbr_reordering_rules = self.reordering_min_qty = self.reordering_max_qty = 0
         read_group_res = self.env['stock.warehouse.orderpoint']._read_group(
             [('product_id', 'in', self.ids)],
             ['product_id'],
             ['__count', 'product_min_qty:sum', 'product_max_qty:sum'])
-        for product, count, product_min_qty_sum, product_max_qty_sum in read_group_res:
+        mapped_res = {product: aggregates for product, *aggregates in read_group_res}
+        for product in self:
+            count, product_min_qty_sum, product_max_qty_sum = mapped_res.get(product._origin, (0, 0, 0))
             product.nbr_reordering_rules = count
             product.reordering_min_qty = product_min_qty_sum
             product.reordering_max_qty = product_max_qty_sum
diff --git a/addons/stock_account/models/product.py b/addons/stock_account/models/product.py
index 2a0ae743616..43dd2a4556d 100644
--- a/addons/stock_account/models/product.py
+++ b/addons/stock_account/models/product.py
@@ -129,21 +129,16 @@ class ProductProduct(models.Model):
             groupby=['product_id'],
             aggregates=['value:sum', 'quantity:sum'],
         )
-        remaining = self
         # Browse all products and compute products' quantities_dict in batch.
-        for product, value_sum, quantity_sum in groups:
+        group_mapping = {product: aggregates for product, *aggregates in groups}
+        for product in self:
+            value_sum, quantity_sum = group_mapping.get(product._origin, (0, 0))
             value_svl = company_id.currency_id.round(value_sum)
             avg_cost = value_svl / quantity_sum if quantity_sum else 0
             product.value_svl = value_svl
             product.quantity_svl = quantity_sum
             product.avg_cost = avg_cost
             product.total_value = avg_cost * product.sudo(False).qty_available
-            remaining -= product
-
-        remaining.value_svl = 0
-        remaining.quantity_svl = 0
-        remaining.avg_cost = 0
-        remaining.total_value = 0
 
     # -------------------------------------------------------------------------
     # Actions