diff --git a/production.py b/production.py
index a8ee65d..01ce45e 100644
--- a/production.py
+++ b/production.py
@@ -1,8 +1,8 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
-# from decimal import Decimal
-from trytond.pool import PoolMeta
-# from trytond.model import fields
+from decimal import Decimal
+from trytond.pool import Pool, PoolMeta
+from trytond.model import fields
 
 
 BOM_CHANGES = ['bom', 'product', 'quantity', 'uom', 'warehouse', 'location',
@@ -13,7 +13,6 @@ class Production(metaclass=PoolMeta):
     "Production"
     __name__ = 'production'
 
-    """
     @fields.depends(
         'bom', 'product', 'uom', 'quantity', 'company', 'inputs', 'outputs',
         methods=['_explode_move_values'])
@@ -56,4 +55,3 @@ class Production(metaclass=PoolMeta):
                 move.unit_price = Decimal(0)
                 outputs.append(move)
         self.outputs = outputs
-    """
diff --git a/sale.xml b/sale.xml
index 2b5d4c8..4700891 100644
--- a/sale.xml
+++ b/sale.xml
@@ -21,27 +21,27 @@
 	<record model="ir.model.button" id="sale_add_pizza_button">
             <field name="name">add_pizza</field>
             <field name="string">Add Pizza</field>
-            <field name="model">sale.sale</field>
+            <field name="model" search="[('model', '=', 'sale.sale')]"/>
 	</record>
 	<record model="ir.model.button" id="sale_order_kitchen_button">
             <field name="name">kitchen</field>
             <field name="string">Kitchen</field>
-	    <field name="model">sale.sale</field>
+            <field name="model" search="[('model', '=', 'sale.sale')]"/>
 	</record>
 	<record model="ir.model.button" id="sale_order_bar_button">
             <field name="name">bar</field>
             <field name="string">Bar</field>
-	    <field name="model">sale.sale</field>
+            <field name="model" search="[('model', '=', 'sale.sale')]"/>
 	</record>
 	<record model="ir.model.button" id="sale_print_bill_button">
             <field name="name">print_bill</field>
             <field name="string">Bill</field>
-	    <field name="model">sale.sale</field>
+            <field name="model" search="[('model', '=', 'sale.sale')]"/>
 	</record>
 	<record model="ir.model.button" id="sale_impreso_button">
             <field name="name">impreso</field>
             <field name="string">Impreso</field>
-	    <field name="model">sale.sale</field>
+            <field name="model" search="[('model', '=', 'sale.sale')]"/>
 	</record>
 	<record model="ir.action.report" id="report_customer_order">
             <field name="name">Customer Order</field>
diff --git a/tests/scenario_report_pizza.rst b/tests/scenario_report_pizza.rst
new file mode 100644
index 0000000..5b81c8d
--- /dev/null
+++ b/tests/scenario_report_pizza.rst
@@ -0,0 +1,258 @@
+=============================
+Sale Line Delete Log Scenario
+=============================
+
+Imports::
+  >>> from decimal import Decimal
+  >>> from proteus import Model, Wizard
+  >>> from trytond.tests.tools import activate_modules
+  >>> from trytond.modules.company.tests.tools import create_company, get_company
+  >>> from trytond.modules.account.tests.tools import (
+  ...     create_chart, create_fiscalyear, create_tax, get_accounts)
+  >>> from trytond.modules.account_invoice.tests.tools import (
+  ...     create_payment_term, set_fiscalyear_invoice_sequences)
+  >>> import datetime as dt
+  >>> today = dt.date.today()
+  >>> from trytond.tests.tools import set_user
+  >>> from trytond.modules.sale_shop.tests.tools import create_shop
+  >>> from trytond.modules.sale_line_delete_log.sale import SaleLineDeleted
+
+
+Activate modules::
+
+  >>> config = activate_modules('sale_fast_food')
+
+
+  >>> User = Model.get('res.user')
+  >>> Party = Model.get('party.party')
+  >>> Employee = Model.get('company.employee')
+  >>> Journal = Model.get('account.journal')
+  >>> PaymentMethod = Model.get('account.invoice.payment.method')
+  >>> Party = Model.get('party.party')
+  >>> ProductUom = Model.get('product.uom')
+  >>> ProductTemplate = Model.get('product.template')
+  >>> Sale = Model.get('sale.sale')
+  >>> SaleLine = Model.get('sale.line')
+
+Create company::
+
+  >>> _ = create_company()
+  >>> company = get_company()
+
+Set employee::
+
+  >>> employee_party = Party(name="Employee")
+  >>> employee_party.save()
+  >>> employee = Employee(party=employee_party)
+  >>> employee.save()
+  >>> user = User(config.user)
+  >>> user.employees.append(employee)
+  >>> user.employee = employee
+  >>> user.save()
+  >>> set_user(user.id)
+
+Create fiscal year::
+
+  >>> fiscalyear = set_fiscalyear_invoice_sequences(create_fiscalyear(company, today))
+  >>> fiscalyear.click('create_period')
+
+Create chart of accounts::
+
+  >>> _ = create_chart(company)
+  >>> accounts = get_accounts(company)
+  >>> revenue = accounts['revenue']
+  >>> expense = accounts['expense']
+  >>> cash = accounts['cash']
+
+  >>> cash_journal, = Journal.find([('type', '=', 'cash')])
+  >>> cash_journal.save()
+  >>> payment_method = PaymentMethod()
+  >>> payment_method.name = 'Cash'
+  >>> payment_method.journal = cash_journal
+  >>> payment_method.credit_account = cash
+  >>> payment_method.debit_account = cash
+  >>> payment_method.save()
+
+Create tax::
+
+  >>> tax = create_tax(Decimal('.10'))
+  >>> tax.save()
+
+Create parties::
+
+  >>> supplier = Party(name='Supplier')
+  >>> supplier.save()
+  >>> customer = Party(name='Customer')
+  >>> customer.save()
+
+Create account categories::
+
+  >>> ProductCategory = Model.get('product.category')
+  >>> account_category = ProductCategory(name="Account Category")
+  >>> account_category.accounting = True
+  >>> account_category.account_expense = expense
+  >>> account_category.account_revenue = revenue
+  >>> account_category.save()
+
+  >>> account_category_tax, = account_category.duplicate()
+  >>> account_category_tax.customer_taxes.append(tax)
+  >>> account_category_tax.save()
+
+Create product::
+
+  >>> unit, = ProductUom.find([('name', '=', 'Unit')])
+
+  >>> template = ProductTemplate()
+  >>> template.name = 'product'
+  >>> template.default_uom = unit
+  >>> template.type = 'goods'
+  >>> template.salable = True
+  >>> template.pizza = True
+  >>> template.list_price = Decimal('10')
+  >>> template.account_category = account_category_tax
+  >>> template.save()
+  >>> product_pizza, = template.products
+
+  >>> template = ProductTemplate()
+  >>> template.name = 'service'
+  >>> template.default_uom = unit
+  >>> template.type = 'service'
+  >>> template.pizza = False
+  >>> template.salable = True
+  >>> template.list_price = Decimal('30')
+  >>> template.account_category = account_category
+  >>> template.save()
+  >>> service, = template.products
+
+Create payment term::
+
+  >>> payment_term = create_payment_term()
+  >>> payment_term.save()
+
+Create product price list::
+
+    >>> ProductPriceList = Model.get('product.price_list')
+    >>> product_price_list = ProductPriceList()
+    >>> product_price_list.name = 'Price List'
+    >>> product_price_list.company = company
+    >>> product_price_list.save()
+
+Create an Inventory::
+
+  >>> Inventory = Model.get('stock.inventory')
+  >>> Location = Model.get('stock.location')
+  >>> storage, = Location.find([
+  ...         ('code', '=', 'STO'),
+  ...         ])
+  >>> inventory = Inventory()
+  >>> inventory.location = storage
+  >>> inventory_line = inventory.lines.new(product=product_pizza)
+  >>> inventory_line.quantity = 100.0
+  >>> inventory_line.expected_quantity = 0.0
+  >>> inventory.click('confirm')
+  >>> inventory.state
+  'done'
+
+Create Sale Shop::
+
+  >>> shop = create_shop(payment_term, product_price_list)
+  >>> shop.save()
+  >>> Device = Model.get('sale.device')
+  >>> device = Device()
+  >>> device.name = "SE Device"
+  >>> device.shop = shop
+  >>> device.save()
+
+Save Sale Shop User::
+
+  >>> User = Model.get('res.user')
+  >>> user, = User.find([])
+  >>> user.shops.append(shop)
+  >>> user.shop = shop
+  >>> user.save()
+  >>> set_user(user)
+
+
+Crear Una Zona de Venta::
+  >>> Zone = Model.get('sale.zone')
+  >>> zone = Zone()
+  >>> zone.name = "Main"
+  >>> zone.save()
+  >>> zone1 = Zone()
+  >>> zone1.name = "SE"
+  >>> zone1.shop = shop
+  >>> zone1.device = device
+  >>> zone1.parent = zone
+  >>> zone1.save()
+  >>> table1 = zone1.tables.new()
+  >>> table1.name = "CH1"
+  >>> table1.save()
+  >>> table2 = zone1.tables.new()
+  >>> table2.name = "CH1"
+  >>> table2.save()
+
+Sale 5 products::
+
+  >>> sale = Sale()
+  >>> sale.party = customer
+  >>> sale.payment_term = payment_term
+  >>> sale.zone = zone1
+  >>> sale.table = table1
+  >>> sale.invoice_method = 'order'
+
+  >>> sale_line = SaleLine()
+  >>> sale.lines.append(sale_line)
+
+  >>> sale_line.product = product_pizza
+  >>> sale_line.quantity = 2.0
+  >>> sale_line.impreso = True
+
+  >>> sale_line = SaleLine()
+  >>> sale.lines.append(sale_line)
+  >>> sale_line.product = product_pizza
+  >>> sale_line.quantity = 3.0
+
+  >>> sale_line = SaleLine()
+  >>> sale.lines.append(sale_line)
+  >>> sale_line.product = service
+  >>> sale_line.quantity = 5.0
+
+  >>> sale.save()
+  >>> len(sale.lines)
+  3
+
+Sale Fast Food Pizzas Sell by Product::
+  >>> ReportSellPizzas = Model.get('sale_fast_food.reporting.product')
+  >>> reports = ReportSellPizzas.find([])
+
+  >>> expected_report = {
+  ...   (product_pizza, 5.0)
+  ...   }
+
+  >>> actual_report = {(r.product_pizza, r.quantity) for r in reports}
+  >>> assert expected_report == actual_report, f"\n Expect: {expected_report} \n Actual: {actual_report}"
+
+Sale Fast Food Sales by User::
+  >>> User = Model.get('res.user')
+  >>> user = User(config.user)
+
+  >>> ReportSalesByUser = Model.get('sale_fast_food.reporting.by_user')
+  >>> reports = ReportSalesByUser.find([])
+
+  >>> expected_report = {
+  ...   (user, 1)
+  ...   }
+
+  >>> actual_report = {(r.user, r.completed_sales) for r in reports}
+  >>> assert expected_report == actual_report, f"\n Expect: {expected_report} \n Actual: {actual_report}"
+
+Sale Fast Food Sales by Zone::
+  >>> ReportSalesByZone = Model.get('sale_fast_food.reporting.zone')
+  >>> reports = ReportSalesByZone.find([])
+
+  >>> expected_report = {
+  ... (table1, zone)
+  ... }
+
+  >>> actual_report = {(r.table, r.zone) for r in reports}
+  >>> assert expected_report == actual_report, f"\n Expect: {expected_report} \n Actual: {actual_report}"
diff --git a/tests/scenario_sale_fast_food.rst b/tests/scenario_sale_fast_food.rst
new file mode 100644
index 0000000..3e7cda3
--- /dev/null
+++ b/tests/scenario_sale_fast_food.rst
@@ -0,0 +1,213 @@
+=============================
+Sale Line Delete Log Scenario
+=============================
+
+Imports::
+  >>> from decimal import Decimal
+  >>> from proteus import Model, Wizard
+  >>> from trytond.tests.tools import activate_modules
+  >>> from trytond.modules.company.tests.tools import create_company, get_company
+  >>> from trytond.modules.account.tests.tools import (
+  ...     create_chart, create_fiscalyear, create_tax, get_accounts)
+  >>> from trytond.modules.account_invoice.tests.tools import (
+  ...     create_payment_term, set_fiscalyear_invoice_sequences)
+  >>> import datetime as dt
+  >>> today = dt.date.today()
+  >>> from trytond.tests.tools import set_user
+  >>> from trytond.modules.sale_shop.tests.tools import create_shop
+  >>> from trytond.modules.sale_line_delete_log.sale import SaleLineDeleted
+
+Activate modules::
+
+  >>> config = activate_modules('sale_fast_food')
+
+Initial data::
+
+  >>> User = Model.get('res.user')
+  >>> Party = Model.get('party.party')
+  >>> Employee = Model.get('company.employee')
+  >>> Journal = Model.get('account.journal')
+  >>> PaymentMethod = Model.get('account.invoice.payment.method')
+  >>> Party = Model.get('party.party')
+  >>> ProductUom = Model.get('product.uom')
+  >>> ProductTemplate = Model.get('product.template')
+  >>> Sale = Model.get('sale.sale')
+  >>> SaleLine = Model.get('sale.line')
+
+Create company::
+
+  >>> _ = create_company()
+  >>> company = get_company()
+
+Set employee::
+
+  >>> employee_party = Party(name="Employee")
+  >>> employee_party.save()
+  >>> employee = Employee(party=employee_party)
+  >>> employee.save()
+  >>> user = User(config.user)
+  >>> user.employees.append(employee)
+  >>> user.employee = employee
+  >>> user.save()
+  >>> set_user(user.id)
+
+Create fiscal year::
+
+  >>> fiscalyear = set_fiscalyear_invoice_sequences(create_fiscalyear(company, today))
+  >>> fiscalyear.click('create_period')
+
+Create chart of accounts::
+
+  >>> _ = create_chart(company)
+  >>> accounts = get_accounts(company)
+  >>> revenue = accounts['revenue']
+  >>> expense = accounts['expense']
+  >>> cash = accounts['cash']
+
+  >>> cash_journal, = Journal.find([('type', '=', 'cash')])
+  >>> cash_journal.save()
+  >>> payment_method = PaymentMethod()
+  >>> payment_method.name = 'Cash'
+  >>> payment_method.journal = cash_journal
+  >>> payment_method.credit_account = cash
+  >>> payment_method.debit_account = cash
+  >>> payment_method.save()
+
+Create tax::
+
+  >>> tax = create_tax(Decimal('.10'))
+  >>> tax.save()
+
+Create parties::
+
+  >>> supplier = Party(name='Supplier')
+  >>> supplier.save()
+  >>> customer = Party(name='Customer')
+  >>> customer.save()
+
+Create account categories::
+
+  >>> ProductCategory = Model.get('product.category')
+  >>> account_category = ProductCategory(name="Account Category")
+  >>> account_category.accounting = True
+  >>> account_category.account_expense = expense
+  >>> account_category.account_revenue = revenue
+  >>> account_category.save()
+
+  >>> account_category_tax, = account_category.duplicate()
+  >>> account_category_tax.customer_taxes.append(tax)
+  >>> account_category_tax.save()
+
+Create product::
+
+  >>> unit, = ProductUom.find([('name', '=', 'Unit')])
+
+  >>> template = ProductTemplate()
+  >>> template.name = 'product'
+  >>> template.default_uom = unit
+  >>> template.type = 'goods'
+  >>> template.salable = True
+  >>> template.pizza = True
+  >>> template.list_price = Decimal('10')
+  >>> template.account_category = account_category_tax
+  >>> template.save()
+  >>> product, = template.products
+
+  >>> template = ProductTemplate()
+  >>> template.name = 'service'
+  >>> template.default_uom = unit
+  >>> template.type = 'service'
+  >>> template.salable = True
+  >>> template.list_price = Decimal('30')
+  >>> template.account_category = account_category
+  >>> template.save()
+  >>> service, = template.products
+
+Create payment term::
+
+  >>> payment_term = create_payment_term()
+  >>> payment_term.save()
+
+Create product price list::
+
+    >>> ProductPriceList = Model.get('product.price_list')
+    >>> product_price_list = ProductPriceList()
+    >>> product_price_list.name = 'Price List'
+    >>> product_price_list.company = company
+    >>> product_price_list.save()
+
+Create an Inventory::
+
+  >>> Inventory = Model.get('stock.inventory')
+  >>> Location = Model.get('stock.location')
+  >>> storage, = Location.find([
+  ...         ('code', '=', 'STO'),
+  ...         ])
+  >>> inventory = Inventory()
+  >>> inventory.location = storage
+  >>> inventory_line = inventory.lines.new(product=product)
+  >>> inventory_line.quantity = 100.0
+  >>> inventory_line.expected_quantity = 0.0
+  >>> inventory.click('confirm')
+  >>> inventory.state
+  'done'
+
+Create Sale Shop::
+
+  >>> shop = create_shop(payment_term, product_price_list)
+  >>> shop.save()
+
+Save Sale Shop User::
+
+  >>> User = Model.get('res.user')
+  >>> user, = User.find([])
+  >>> user.shops.append(shop)
+  >>> user.shop = shop
+  >>> user.save()
+  >>> set_user(user)
+
+Sale 5 products::
+
+  >>> sale = Sale()
+  >>> sale.party = customer
+  >>> sale.payment_term = payment_term
+  >>> sale.invoice_method = 'order'
+
+  >>> sale_line = SaleLine()
+  >>> sale.lines.append(sale_line)
+  >>> sale_line.product = product
+  >>> sale_line.quantity = 2.0
+  >>> sale_line.impreso = True
+
+  >>> sale_line = SaleLine()
+  >>> sale.lines.append(sale_line)
+  >>> sale_line.type = 'comment'
+  >>> sale_line.description = 'Comment'
+
+  >>> sale_line = SaleLine()
+  >>> sale.lines.append(sale_line)
+  >>> sale_line.product = product
+  >>> sale_line.quantity = 3.0
+  >>> sale.save()
+  >>> len(sale.lines)
+  3
+  >>> sale.untaxed_amount, sale.tax_amount, sale.total_amount
+  (Decimal('50.00'), Decimal('5.00'), Decimal('55.00'))
+
+
+Create a sale line delete log it's was printed::
+
+  >>> sale.reload()
+  >>> sale.lines[0].delete()
+  >>> sale.lines[1].delete()
+  >>> sale.save()
+  >>> len(sale.lines)
+  1
+
+  >>> sale.reload()
+  >>> len(sale.delete_lines)
+  1
+
+  >>> sale.delete_lines[0]
+  proteus.Model.get('sale.line_deleted')(1)
+  >>> assert isinstance(sale.delete_lines[0], Model.get('sale.line_deleted')), "it's not instance SaleLineDeleted"
diff --git a/tryton.cfg b/tryton.cfg
index 602ca5a..5a7c753 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -1,5 +1,5 @@
 [tryton]
-version=7.6.0
+version=6.8.0
 depends:
     ir
     res