diff --git a/addons/hr/i18n/hr.pot b/addons/hr/i18n/hr.pot
index 7d01e6fd4fb..7051e1dab9d 100644
--- a/addons/hr/i18n/hr.pot
+++ b/addons/hr/i18n/hr.pot
@@ -2546,7 +2546,7 @@ msgstr ""
 #. odoo-python
 #: code:addons/hr/models/hr_plan_activity_type.py:0
 #, python-format
-msgid "User of coach of employee %s is not set."
+msgid "The user of %s's coach is not set."
 msgstr ""
 
 #. module: hr
diff --git a/addons/hr/models/hr_plan_activity_type.py b/addons/hr/models/hr_plan_activity_type.py
index cab65ff80f0..572f72504eb 100644
--- a/addons/hr/models/hr_plan_activity_type.py
+++ b/addons/hr/models/hr_plan_activity_type.py
@@ -44,13 +44,13 @@ class HrPlanActivityType(models.Model):
             if not employee.coach_id:
                 warning = _('Coach of employee %s is not set.', employee.name)
             responsible = employee.coach_id.user_id
-            if not responsible:
-                warning = _('User of coach of employee %s is not set.', employee.name)
+            if employee.coach_id and not responsible:
+                warning = _("The user of %s's coach is not set.", employee.name)
         elif self.responsible == 'manager':
             if not employee.parent_id:
                 warning = _('Manager of employee %s is not set.', employee.name)
             responsible = employee.parent_id.user_id
-            if not responsible:
+            if employee.parent_id and not responsible:
                 warning = _("The manager of %s should be linked to a user.", employee.name)
         elif self.responsible == 'employee':
             responsible = employee.user_id