diff --git a/account_group_menu/demo/account_group.xml b/account_group_menu/demo/account_group.xml
index 5bb4b4219..0fc941b37 100644
--- a/account_group_menu/demo/account_group.xml
+++ b/account_group_menu/demo/account_group.xml
@@ -6,47 +6,47 @@
     </record>
     <record id="demo_account_group_1" model="account.group">
         <field name="name">Class 1</field>
-        <field name="code_prefix">1</field>
+        <field name="code_prefix">T1</field>
         <field name="parent_id" ref="demo_account_group_root"/>
     </record>
     <record id="demo_account_group_11" model="account.group">
         <field name="name">Class 11</field>
-        <field name="code_prefix">11</field>
+        <field name="code_prefix">T11</field>
         <field name="parent_id" ref="demo_account_group_1"/>
     </record>
     <record id="demo_account_group_2" model="account.group">
         <field name="name">Class 2</field>
-        <field name="code_prefix">1</field>
+        <field name="code_prefix">T2</field>
         <field name="parent_id" ref="demo_account_group_root"/>
     </record>
     <!-- Accounts -->
     <record id="demo_account_105" model="account.account">
         <field name="name">Account 105</field>
-        <field name="code">105</field>
+        <field name="code">T105</field>
         <field name="group_id" ref="demo_account_group_1"/>
         <field name="user_type_id" ref="account.data_account_type_non_current_liabilities"/>
     </record>
     <record id="demo_account_110" model="account.account">
         <field name="name">Account 110</field>
-        <field name="code">110</field>
+        <field name="code">T110</field>
         <field name="group_id" ref="demo_account_group_1"/>
         <field name="user_type_id" ref="account.data_account_type_non_current_liabilities"/>
     </record>
     <record id="demo_account_111" model="account.account">
         <field name="name">Account 111</field>
-        <field name="code">111</field>
+        <field name="code">T111</field>
         <field name="group_id" ref="demo_account_group_1"/>
         <field name="user_type_id" ref="account.data_account_type_non_current_liabilities"/>
     </record>
     <record id="demo_account_112" model="account.account">
         <field name="name">Account 112</field>
-        <field name="code">112</field>
+        <field name="code">T112</field>
         <field name="group_id" ref="demo_account_group_1"/>
         <field name="user_type_id" ref="account.data_account_type_non_current_liabilities"/>
     </record>
     <record id="demo_account_130" model="account.account">
         <field name="name">Account 130</field>
-        <field name="code">130</field>
+        <field name="code">T130</field>
         <field name="user_type_id" ref="account.data_account_type_non_current_liabilities"/>
     </record>
 </odoo>