Specify association dependency

app/models/person.rb

@@ -21,7 +21,8 @@ class Person < ApplicationRecord
   has_one :current_relationship,
           -> { order(active_since: :desc) },
           class_name: 'Relationship',
-          inverse_of: :person
+          inverse_of: :person,
+          dependent: :restrict_with_exception
 
   has_many :person_comments, dependent: :restrict_with_exception
 

spec/models/person_spec.rb

@@ -26,6 +26,7 @@ RSpec.describe Person do
       have_one(:current_relationship)
       .class_name('Relationship')
       .inverse_of(:person)
+      .dependent(:restrict_with_exception)
       .order(active_since: :desc)
   end