diff --git a/tracking_manager/models/__init__.py b/tracking_manager/models/__init__.py
index b6ac322dcc5..93477db65e8 100644
--- a/tracking_manager/models/__init__.py
+++ b/tracking_manager/models/__init__.py
@@ -1,4 +1,3 @@
 from . import mail_thread
 from . import ir_model
 from . import models
-from . import mail_tracking_value
diff --git a/tracking_manager/models/mail_tracking_value.py b/tracking_manager/models/mail_tracking_value.py
deleted file mode 100644
index 34338f0404e..00000000000
--- a/tracking_manager/models/mail_tracking_value.py
+++ /dev/null
@@ -1,28 +0,0 @@
-# Copyright 2023 Akretion (https://www.akretion.com).
-# @author Sébastien BEAU <sebastien.beau@akretion.com>
-# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
-
-from odoo import models
-
-from ..tools import format_m2m
-
-
-class MailTrackingValue(models.Model):
-    _inherit = "mail.tracking.value"
-
-    def create_tracking_values(
-        self,
-        initial_value,
-        new_value,
-        col_name,
-        col_info,
-        tracking_sequence,
-        model_name,
-    ):
-        if col_info["type"] == "many2many":
-            col_info["type"] = "text"
-            initial_value = format_m2m(initial_value)
-            new_value = format_m2m(new_value)
-        return super().create_tracking_values(
-            initial_value, new_value, col_name, col_info, tracking_sequence, model_name
-        )
diff --git a/tracking_manager/tests/test_tracking_manager.py b/tracking_manager/tests/test_tracking_manager.py
index 0937ed88f8d..0226ba2e954 100644
--- a/tracking_manager/tests/test_tracking_manager.py
+++ b/tracking_manager/tests/test_tracking_manager.py
@@ -89,16 +89,16 @@ def test_m2m_add_line(self):
         self.assertEqual(len(self.messages), 1)
         tracking = self.messages.tracking_value_ids
         self.assertEqual(len(tracking), 1)
-        self.assertEqual(tracking.old_value_text, "FOO")
-        self.assertEqual(tracking.new_value_text, "FOO; BAR")
+        self.assertEqual(tracking.old_value_char, "FOO")
+        self.assertEqual(tracking.new_value_char, "FOO, BAR")
 
     def test_m2m_delete_line(self):
         self.partner.write({"category_id": [(6, 0, [])]})
         self.assertEqual(len(self.messages), 1)
         tracking = self.messages.tracking_value_ids
         self.assertEqual(len(tracking), 1)
-        self.assertEqual(tracking.old_value_text, "FOO")
-        self.assertEqual(tracking.new_value_text, "")
+        self.assertEqual(tracking.old_value_char, "FOO")
+        self.assertEqual(tracking.new_value_char, "")
 
     def test_m2m_multi_line(self):
         self.partner.write(
@@ -118,8 +118,8 @@ def test_m2m_multi_line(self):
         self.assertEqual(len(self.messages), 1)
         tracking = self.messages.tracking_value_ids
         self.assertEqual(len(tracking), 1)
-        self.assertEqual(tracking.old_value_text, "FOO")
-        self.assertEqual(tracking.new_value_text, "BAR; TOOH")
+        self.assertEqual(tracking.old_value_char, "FOO")
+        self.assertEqual(tracking.new_value_char, "BAR, TOOH")
 
     def test_o2m_create_indirectly(self):
         self.partner.write({"user_ids": [(0, 0, {"login": "1234567890"})]})