diff --git a/lib/tasks/2019_02_18_migrate_service_organisme.rake b/lib/tasks/2019_02_18_migrate_service_organisme.rake
deleted file mode 100644
index 369a85a5f..000000000
--- a/lib/tasks/2019_02_18_migrate_service_organisme.rake
+++ /dev/null
@@ -1,17 +0,0 @@
-namespace :after_party do
-  desc 'Deployment task:  migrate service organisme'
-  task migrate_service_organisme: :environment do
-    table = {
-      'commune': 'collectivite_territoriale',
-      'departement': 'collectivite_territoriale',
-      'region': 'collectivite_territoriale',
-      'prefecture': 'service_deconcentre_de_l_etat'
-    }
-
-    table.each do |(old_name, new_name)|
-      Service.where(type_organisme: old_name).update_all(type_organisme: new_name)
-    end
-
-    AfterParty::TaskRecord.create version: '20190201121252'
-  end
-end
diff --git a/lib/tasks/2019_06_06_fix_timestamps_of_migrated_dossiers.rake b/lib/tasks/2019_06_06_fix_timestamps_of_migrated_dossiers.rake
deleted file mode 100644
index d4e97825d..000000000
--- a/lib/tasks/2019_06_06_fix_timestamps_of_migrated_dossiers.rake
+++ /dev/null
@@ -1,19 +0,0 @@
-require Rails.root.join("lib", "tasks", "task_helper")
-
-namespace :fix_timestamps_of_migrated_dossiers do
-  desc 'Fix the timestamps of dossiers affected by the faulty PJ migration'
-  task run: :environment do
-    affected_time_range = Time.utc(2019, 6, 4, 8, 0)..Time.utc(2019, 6, 4, 18, 0)
-    dossiers = Dossier.with_discarded.includes(:groupe_instructeur).where(groupe_instructeurs: { procedure_id: 0..1000 }).where(updated_at: affected_time_range)
-
-    progress = ProgressReport.new(dossiers.count)
-
-    dossiers.find_each do |dossier|
-      fixed_updated_at = dossier.processed_at || dossier.en_instruction_at || dossier.en_construction_at || dossier.champs.last.updated_at || nil
-      dossier.update_column(:updated_at, fixed_updated_at)
-
-      progress.inc
-    end
-    progress.finish
-  end
-end
diff --git a/lib/tasks/tmp_set_dossiers_last_updated_at.rake b/lib/tasks/tmp_set_dossiers_last_updated_at.rake
deleted file mode 100644
index d506cb2f8..000000000
--- a/lib/tasks/tmp_set_dossiers_last_updated_at.rake
+++ /dev/null
@@ -1,37 +0,0 @@
-require Rails.root.join("lib", "tasks", "task_helper")
-
-namespace :tmp_set_dossiers_last_updated_at do
-  desc 'set for all dossiers last_updated_at'
-  task run: :environment do
-    start_id = ENV.fetch('DOSSIER_START_AT', 0)
-
-    all_dossiers = Dossier.with_discarded
-      .where('dossiers.id > ?', start_id)
-      .includes(:champs, :avis, :commentaires)
-      .order(:id)
-
-    progress = ProgressReport.new(all_dossiers.count)
-
-    all_dossiers.in_batches do |dossiers|
-      dossiers.each do |dossier|
-        last_commentaire_updated_at = dossier.commentaires
-          .where.not(email: OLD_CONTACT_EMAIL)
-          .where.not(email: CONTACT_EMAIL)
-          .maximum(:updated_at)
-        last_avis_updated_at = dossier.avis.maximum(:updated_at)
-        last_champ_updated_at = dossier.champs.maximum(:updated_at)
-        last_champ_private_updated_at = dossier.champs_private.maximum(:updated_at)
-        dossier.update_columns(
-          last_commentaire_updated_at: last_commentaire_updated_at,
-          last_avis_updated_at: last_avis_updated_at,
-          last_champ_updated_at: last_champ_updated_at,
-          last_champ_private_updated_at: last_champ_private_updated_at
-        )
-        progress.inc
-      end
-      rake_puts "dossiers lastid: #{dossiers.last.id}"
-    end
-
-    progress.finish
-  end
-end
diff --git a/spec/lib/tasks/2019_06_06_fix_timestamps_of_migrated_dossiers_spec.rb b/spec/lib/tasks/2019_06_06_fix_timestamps_of_migrated_dossiers_spec.rb
deleted file mode 100644
index 4661eaf72..000000000
--- a/spec/lib/tasks/2019_06_06_fix_timestamps_of_migrated_dossiers_spec.rb
+++ /dev/null
@@ -1,48 +0,0 @@
-describe '2019_06_06_fix_timestamps_of_migrated_dossiers' do
-  let(:affected_procedure) { create(:simple_procedure, id: 500) }
-  let(:procedure_outside_range) { create(:simple_procedure, id: 5000) }
-
-  let(:affected_dossier) { create(:dossier, procedure: affected_procedure) }
-  let(:dossier_outside_time_range) { create(:dossier, procedure: affected_procedure) }
-  let(:dossier_outside_procedure_range) { create(:dossier, procedure: procedure_outside_range) }
-
-  let(:creation_time) { Time.utc(2017, 1, 1, 12, 0) }
-  let(:en_construction_time) { Time.utc(2018, 1, 1, 12, 0) }
-  let(:pj_migration_time) { Time.utc(2019, 6, 4, 12, 0) }
-
-  let(:rake_task) { Rake::Task['fix_timestamps_of_migrated_dossiers:run'] }
-
-  before do
-    Timecop.freeze(creation_time) do
-      affected_dossier
-      dossier_outside_time_range
-      dossier_outside_procedure_range
-    end
-    Timecop.freeze(en_construction_time) do
-      affected_dossier.update_column(:en_construction_at, Time.zone.now)
-    end
-    Timecop.freeze(pj_migration_time.prev_week) do
-      dossier_outside_time_range.tap(&:touch).reload
-    end
-    Timecop.freeze(pj_migration_time) do
-      dossier_outside_procedure_range.tap(&:touch).reload
-      affected_dossier.tap(&:touch).reload
-    end
-
-    rake_task.invoke
-  end
-
-  after { rake_task.reenable }
-
-  it 'fix the updated_at of affected dossiers' do
-    expect(affected_dossier.reload.updated_at).to eq(en_construction_time)
-  end
-
-  it 'ignores dossiers with a procedure_id outside of the procedure range' do
-    expect(dossier_outside_procedure_range.reload.updated_at).to eq(pj_migration_time)
-  end
-
-  it 'ignores dossiers with an updated_at outside of the time range' do
-    expect(dossier_outside_time_range.reload.updated_at).to eq(pj_migration_time.prev_week)
-  end
-end