diff --git a/app/models/conference.rb b/app/models/conference.rb
index 89ca5d19..ca37e6d0 100644
--- a/app/models/conference.rb
+++ b/app/models/conference.rb
@@ -1120,7 +1120,6 @@ class Conference < ApplicationRecord
   #
   def create_email_settings
     build_email_settings
-    true
   end
 
   ##
diff --git a/app/models/program.rb b/app/models/program.rb
index 6c3a3b4a..0dadee15 100644
--- a/app/models/program.rb
+++ b/app/models/program.rb
@@ -211,7 +211,6 @@ class Program < ApplicationRecord
     EventType.create(title: 'Workshop', length: 60, color: '#0000FF', description: 'Interactive hands-on practice',
                      minimum_abstract_length: 0,
                      maximum_abstract_length: 500, program_id: id)
-    true
   end
 
   ##
@@ -227,7 +226,6 @@ class Program < ApplicationRecord
     DifficultyLevel.create(title: 'Hard',
                            description: 'Events require expert knowledge of the topic.',
                            color: '#EF6E69', program_id: id)
-    true
   end
 
   ##
diff --git a/app/models/role.rb b/app/models/role.rb
index d759f47d..2be87d7b 100644
--- a/app/models/role.rb
+++ b/app/models/role.rb
@@ -18,6 +18,6 @@ class Role < ApplicationRecord
 
   # Needed to ensure that removing all user from role doesn't remove role.
   def cancel
-    false
+    throw(:abort)
   end
 end
diff --git a/config/initializers/new_framework_defaults.rb b/config/initializers/new_framework_defaults.rb
index cbf423a8..534a2396 100644
--- a/config/initializers/new_framework_defaults.rb
+++ b/config/initializers/new_framework_defaults.rb
@@ -20,6 +20,3 @@ ActiveSupport.to_time_preserves_timezone = false
 
 # Require `belongs_to` associations by default. Previous versions had false.
 Rails.application.config.active_record.belongs_to_required_by_default = false
-
-# Do not halt callback chains when a callback returns false. Previous versions had true.
-ActiveSupport.halt_callback_chains_on_return_false = true