diff --git a/partner_relations/model/res_partner_relation_type.py b/partner_relations/model/res_partner_relation_type.py
index 3f341859d..ad6d5bb79 100644
--- a/partner_relations/model/res_partner_relation_type.py
+++ b/partner_relations/model/res_partner_relation_type.py
@@ -63,7 +63,8 @@ class ResPartnerRelationType(models.Model):
     )
 
     _sql_constraints = [
-        ('name_unique', 'unique(name)', 'partner relation name already exists!'),
+        ('name_unique', 'unique(name)',
+         'partner relation name already exists!'),
         ('name_inverse_unique', 'unique(name_inverse)',
          'partner relation name_inverse already exists!'),
     ]