diff --git a/account_move_line_accounting_description/models/account_move.py b/account_move_line_accounting_description/models/account_move.py
index 318af17e7d3..3de12c5679a 100644
--- a/account_move_line_accounting_description/models/account_move.py
+++ b/account_move_line_accounting_description/models/account_move.py
@@ -7,11 +7,12 @@
 class AccountMoveLine(models.Model):
     _inherit = "account.move.line"
 
-    external_name = fields.Char(string="External Name", related="product_id.name")
+    external_name = fields.Char(string="External Name")
 
     @api.onchange("product_id")
     def _onchange_product_id(self):
         super()._onchange_product_id()
         for line in self:
+            line.external_name = line.name
             if line.product_id.accounting_description:
                 line.name = line.product_id.accounting_description
diff --git a/account_move_line_accounting_description/tests/test_account_move_line_description.py b/account_move_line_accounting_description/tests/test_account_move_line_description.py
index 16fcc5daf14..0e9c410eccb 100644
--- a/account_move_line_accounting_description/tests/test_account_move_line_description.py
+++ b/account_move_line_accounting_description/tests/test_account_move_line_description.py
@@ -24,32 +24,18 @@ def setUpClass(cls):
 
         cls.account_move = cls.env["account.move"]
 
+    def test_invoice_line_with_accounting_description(self):
         invoice_form_acc_desc = Form(
-            cls.account_move.with_context(default_move_type="out_invoice")
+            self.account_move.with_context(default_move_type="out_invoice")
         )
-        invoice_form_no_acc_desc = Form(
-            cls.account_move.with_context(default_move_type="out_invoice")
-        )
-
-        invoice_form_acc_desc.partner_id = (
-            invoice_form_no_acc_desc.partner_id
-        ) = cls.partner_1
+        invoice_form_acc_desc.partner_id = self.partner_1
 
         with invoice_form_acc_desc.invoice_line_ids.new() as line_form:
-            line_form.product_id = cls.product_with_acc_desc
+            line_form.product_id = self.product_with_acc_desc
             line_form.quantity = 1
             line_form.price_unit = 2.99
 
-        cls.invoice_acc_desc = invoice_form_acc_desc.save()
-
-        with invoice_form_no_acc_desc.invoice_line_ids.new() as line_form:
-            line_form.product_id = cls.product_without_acc_desc
-            line_form.quantity = 1
-            line_form.price_unit = 2.99
-
-        cls.invoice_no_acc_desc = invoice_form_no_acc_desc.save()
-
-    def test_invoice_line_description(self):
+        self.invoice_acc_desc = invoice_form_acc_desc.save()
         inv_line_with_product = self.invoice_acc_desc.invoice_line_ids.filtered(
             lambda x: x.product_id
         )
@@ -58,11 +44,23 @@ def test_invoice_line_description(self):
             inv_line_with_product.name,
             self.product_with_acc_desc.accounting_description,
         )
-
         self.assertEqual(
             inv_line_with_product.product_id.name, inv_line_with_product.external_name
         )
 
+    def test_invoice_line_without_accounting_description(self):
+        invoice_form_no_acc_desc = Form(
+            self.account_move.with_context(default_move_type="out_invoice")
+        )
+
+        invoice_form_no_acc_desc.partner_id = self.partner_1
+
+        with invoice_form_no_acc_desc.invoice_line_ids.new() as line_form:
+            line_form.product_id = self.product_without_acc_desc
+            line_form.quantity = 1
+            line_form.price_unit = 2.99
+
+        self.invoice_no_acc_desc = invoice_form_no_acc_desc.save()
         inv_line_with_product = self.invoice_no_acc_desc.invoice_line_ids.filtered(
             lambda x: x.product_id
         )
diff --git a/account_move_line_accounting_description/views/account_move.xml b/account_move_line_accounting_description/views/account_move.xml
index e8216658a35..65508de75ae 100644
--- a/account_move_line_accounting_description/views/account_move.xml
+++ b/account_move_line_accounting_description/views/account_move.xml
@@ -17,6 +17,18 @@
             <xpath expr="//field[@name='invoice_line_ids']//form" position="inside">
                 <field name="external_name" />
             </xpath>
+            <!--
+            WARNING: We need to display the field as invisible here although it
+             is already defined on invoice_line_ids tree above. Having it
+             defined only there would only set the external_name key with its
+             value inside the invoice_line_ids key of the values dictionary
+             that is passed to create function. However, this invoice_line_ids
+             key is popped in account.move._move_autocomplete_invoice_lines_create
+             function to keep only the line_ids to create the account.move and
+             avoid duplicated account.move.line records. -->
+            <xpath expr="//field[@name='line_ids']//tree" position="inside">
+                <field name="external_name" invisible="1" />
+            </xpath>
         </field>
     </record>
 </odoo>