diff --git a/__init__.py b/__init__.py
index 5b999b9..ed1a014 100644
--- a/__init__.py
+++ b/__init__.py
@@ -1,14 +1,13 @@
 #This file is part product_purchase_sequence module for Tryton.
 #The COPYRIGHT file at the top level of this repository contains
 #the full copyright notices and license terms.
-
 from trytond.pool import Pool
 from .product import *
 from .configuration import *
 
+
 def register():
     Pool.register(
-        ProductConfiguration,
-        ProductConfigurationCompany,
+        Configuration,
         Product,
         module='product_purchase_sequence', type_='model')
diff --git a/configuration.py b/configuration.py
index 79ee773..bb53627 100644
--- a/configuration.py
+++ b/configuration.py
@@ -4,26 +4,14 @@
 from trytond.model import fields
 from trytond.pool import PoolMeta
 
-__all__ = [
-    'ProductConfiguration',
-    'ProductConfigurationCompany',
-]
+__all__ = ['Configuration']
 __metaclass__ = PoolMeta
 
 
-class ProductConfiguration:
-    'Product Configuration'
+class Configuration:
     __name__ = 'product.configuration'
-    purchasable_sequence = fields.Function(fields.Many2One('ir.sequence', 'Purchasable Sequence',
-        domain=[
-            ('code', '=', 'product.product'),
-        ], required=True),'get_fields', setter='set_fields')
+    purchasable_sequence = fields.Property(fields.Many2One('ir.sequence',
+            'Purchasable Sequence', domain=[
+                ('code', '=', 'product.product'),
+                ], required=True))
 
-
-class ProductConfigurationCompany:
-    'Product Configuration Company'
-    __name__ = 'product.configuration.company'
-    purchasable_sequence = fields.Many2One('ir.sequence', 'Purchasable sequence', 
-        domain=[
-            ('code', '=', 'product.product'),
-        ], required=True)
diff --git a/view/product_configuration_form.xml b/view/product_configuration_form.xml
index 0b4d03a..37fb238 100644
--- a/view/product_configuration_form.xml
+++ b/view/product_configuration_form.xml
@@ -1,10 +1,8 @@
 <?xml version="1.0"?>
-<!-- This file is part product_configuration module for Tryton.
+<!-- This file is part product_purchase_sequence module for Tryton.
 The COPYRIGHT file at the top level of this repository contains the full copyright notices and license terms. -->
 <data>
-    <xpath
-        expr="/form/field[@name='salable_sequence']"
-        position="after">
+    <xpath expr="/form" position="inside">
             <label name="purchasable_sequence"/>
             <field name="purchasable_sequence"/>
     </xpath>