diff --git a/partner_contact_department/__init__.py b/partner_contact_department/__init__.py
index 83e553ac4..4b76c7b2d 100644
--- a/partner_contact_department/__init__.py
+++ b/partner_contact_department/__init__.py
@@ -1,3 +1,3 @@
-# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
 
 from . import models
diff --git a/partner_contact_department/__manifest__.py b/partner_contact_department/__manifest__.py
index 206e931da..7737a6f8c 100644
--- a/partner_contact_department/__manifest__.py
+++ b/partner_contact_department/__manifest__.py
@@ -1,14 +1,14 @@
 # Copyright 2014-2015 Tecnativa S.L. - Jairo Llopis
 # Copyright 2016 Tecnativa S.L. - Vicent Cubells
 # Copyright 2017 Tecnativa S.L. - David Vidal
-# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
 
 {
     "name": "Partner Contact Department",
     "summary": "Assign contacts to departments",
     "version": "13.0.1.0.0",
     "category": "Customer Relationship Management",
-    "author": "Tecnativa, " "Odoo Community Association (OCA)",
+    "author": "Tecnativa, Odoo Community Association (OCA)",
     "license": "AGPL-3",
     "website": "https://github.com/OCA/partner-contact",
     "application": False,
diff --git a/partner_contact_department/models/__init__.py b/partner_contact_department/models/__init__.py
index ccebc7247..284a83ff1 100644
--- a/partner_contact_department/models/__init__.py
+++ b/partner_contact_department/models/__init__.py
@@ -1,3 +1,3 @@
-# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
 
 from . import res_partner
diff --git a/partner_contact_department/models/res_partner.py b/partner_contact_department/models/res_partner.py
index 7053bb356..6ec252b26 100644
--- a/partner_contact_department/models/res_partner.py
+++ b/partner_contact_department/models/res_partner.py
@@ -1,9 +1,8 @@
 # © 2014-2015 Tecnativa S.L. - Jairo Llopis
 # © 2016 Tecnativa S.L. - Vicent Cubells
-# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
 
-from odoo import _, api, fields, models
-from odoo.exceptions import ValidationError
+from odoo import fields, models
 
 
 class ResPartner(models.Model):
@@ -27,8 +26,3 @@ class ResPartnerDepartment(models.Model):
         "res.partner.department", "parent_id", "Child departments"
     )
     parent_path = fields.Char(index=True)
-
-    @api.constrains("parent_id")
-    def _check_parent_id(self):
-        if not self._check_recursion():
-            raise ValidationError(_("Error! You cannot create recursive departments."))
diff --git a/partner_contact_department/tests/__init__.py b/partner_contact_department/tests/__init__.py
index 1d19e3db4..eff500b85 100644
--- a/partner_contact_department/tests/__init__.py
+++ b/partner_contact_department/tests/__init__.py
@@ -1,3 +1,3 @@
-# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl-3.0).
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl-3.0).
 
 from . import test_recursion
diff --git a/partner_contact_department/tests/test_recursion.py b/partner_contact_department/tests/test_recursion.py
index 925152cf0..5a56a5e40 100644
--- a/partner_contact_department/tests/test_recursion.py
+++ b/partner_contact_department/tests/test_recursion.py
@@ -1,5 +1,5 @@
 # © 2016 Tecnativa - Vicent Cubells
-# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl-3.0).
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl-3.0).
 from odoo.exceptions import UserError
 from odoo.tests import common