diff --git a/addons/resource/i18n/resource.pot b/addons/resource/i18n/resource.pot
index c8b5cd48516..fe21327daab 100644
--- a/addons/resource/i18n/resource.pot
+++ b/addons/resource/i18n/resource.pot
@@ -242,6 +242,13 @@ msgid ""
 "record without removing it."
 msgstr ""
 
+#. module: resource
+#: code:addons/resource/models/resource.py:0
+#, python-format
+msgid ""
+"In a calendar with 2 weeks mode, all periods need to be in the sections."
+msgstr ""
+
 #. module: resource
 #: model_terms:ir.ui.view,arch_db:resource.view_resource_resource_search
 msgid "Inactive"
diff --git a/addons/resource/models/resource.py b/addons/resource/models/resource.py
index daf16b47e16..fb79c8819ae 100644
--- a/addons/resource/models/resource.py
+++ b/addons/resource/models/resource.py
@@ -204,6 +204,14 @@ class ResourceCalendar(models.Model):
             default.update(name=_('%s (copy)') % (self.name))
         return super(ResourceCalendar, self).copy(default)
 
+    @api.constrains('attendance_ids')
+    def _check_attendance_ids(self):
+        for resource in self:
+            if (resource.two_weeks_calendar and
+                    resource.attendance_ids.filtered(lambda a: a.display_type == 'line_section') and
+                    not resource.attendance_ids.sorted('sequence')[0].display_type):
+                raise ValidationError(_("In a calendar with 2 weeks mode, all periods need to be in the sections."))
+
     @api.depends('two_weeks_calendar')
     def _compute_two_weeks_explanation(self):
         today = fields.Date.today()
diff --git a/addons/resource/views/resource_views.xml b/addons/resource/views/resource_views.xml
index b3c24fb2058..e407f579d10 100644
--- a/addons/resource/views/resource_views.xml
+++ b/addons/resource/views/resource_views.xml
@@ -204,6 +204,7 @@
                 <field name="hour_to" widget="float_time"/>
                 <field name="date_from"/>
                 <field name="date_to"/>
+                <field name="week_type" readonly="1" force_save="1" groups="base.group_no_one"/>
             </tree>
         </field>
     </record>