diff --git a/openupgrade_scripts/scripts/resource/17.0.1.1/pre-migration.py b/openupgrade_scripts/scripts/resource/17.0.1.1/pre-migration.py
index 2423ea505409..02c3ebefc4c9 100644
--- a/openupgrade_scripts/scripts/resource/17.0.1.1/pre-migration.py
+++ b/openupgrade_scripts/scripts/resource/17.0.1.1/pre-migration.py
@@ -1,11 +1,26 @@
 # Copyright 2024 Viindoo Technology Joint Stock Company (Viindoo)
+# Copyright 2024 Tecnativa - Pedro M. Baeza
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 
 from openupgradelib import openupgrade
 
 
+def _reset_calendar_attendance_sequence(env):
+    """As the field `sequence` exists previously in 16, and you were able to change it
+    on screen, there's a chance that your DB have some sequence values that alters the
+    previous order when migrating.
+
+    Thus, the safest thing is to reset the sequence value to its default value for
+    preserving always the previous order.
+    """
+    openupgrade.logged_query(
+        env.cr, "UPDATE resource_calendar_attendance SET sequence = 10"
+    )
+
+
 @openupgrade.migrate()
 def migrate(env, version):
+    _reset_calendar_attendance_sequence(env)
     openupgrade.set_xml_ids_noupdate_value(
         env,
         "resource",
diff --git a/openupgrade_scripts/scripts/resource/17.0.1.1/upgrade_analysis_work.txt b/openupgrade_scripts/scripts/resource/17.0.1.1/upgrade_analysis_work.txt
index 04d232058ed2..b6b18907bcb4 100644
--- a/openupgrade_scripts/scripts/resource/17.0.1.1/upgrade_analysis_work.txt
+++ b/openupgrade_scripts/scripts/resource/17.0.1.1/upgrade_analysis_work.txt
@@ -4,7 +4,7 @@ resource     / resource.calendar        / hours_per_day (float)         : now a
 # Nothing To Do, compute non-stored
 
 resource     / resource.calendar.attendance / _order                        : _order is now 'sequence, week_type, dayofweek, hour_from' ('week_type, dayofweek, hour_from')
-# Nothing To Do, default order when search
+# DONE: pre-migration: Reset the sequence field to its default value for preserving the order.
 
 resource     / resource.calendar.attendance / day_period (selection)        : selection_keys is now '['afternoon', 'lunch', 'morning']' ('['afternoon', 'morning']')
 # Nothing To Do, new option: lunch