diff --git a/app/models/budget/phase.rb b/app/models/budget/phase.rb
index 462d64ef6..903c698aa 100644
--- a/app/models/budget/phase.rb
+++ b/app/models/budget/phase.rb
@@ -12,7 +12,7 @@ class Budget
     validates :budget, presence: true
     validates :kind, presence: true, uniqueness: { scope: :budget }, inclusion: { in: PHASE_KINDS }
     validates :description, length: { maximum: DESCRIPTION_MAX_LENGTH }
-    validate :dates_range_valid?
+    validate :invalid_dates_range?
     validate :prev_phase_dates_valid?
     validate :next_phase_dates_valid?
 
@@ -48,7 +48,7 @@ class Budget
       end
     end
 
-    def dates_range_valid?
+    def invalid_dates_range?
       if starts_at.present? && ends_at.present? && starts_at >= ends_at
         errors.add(:starts_at, I18n.t('budgets.phases.errors.dates_range_invalid'))
       end
@@ -59,7 +59,7 @@ class Budget
     def prev_phase_dates_valid?
       if enabled? && starts_at.present? && prev_enabled_phase.present?
         prev_enabled_phase.assign_attributes(ends_at: starts_at)
-        if prev_enabled_phase.dates_range_valid?
+        if prev_enabled_phase.invalid_dates_range?
           phase_name = I18n.t("budgets.phase.#{prev_enabled_phase.kind}")
           error = I18n.t('budgets.phases.errors.prev_phase_dates_invalid', phase_name: phase_name)
           errors.add(:starts_at, error)
@@ -70,7 +70,7 @@ class Budget
     def next_phase_dates_valid?
       if enabled? && ends_at.present? && next_enabled_phase.present?
         next_enabled_phase.assign_attributes(starts_at: ends_at)
-        if next_enabled_phase.dates_range_valid?
+        if next_enabled_phase.invalid_dates_range?
           phase_name = I18n.t("budgets.phase.#{next_enabled_phase.kind}")
           error = I18n.t('budgets.phases.errors.next_phase_dates_invalid', phase_name: phase_name)
           errors.add(:ends_at, error)
diff --git a/lib/tasks/budgets.rake b/lib/tasks/budgets.rake
index f9810ac1c..738649538 100644
--- a/lib/tasks/budgets.rake
+++ b/lib/tasks/budgets.rake
@@ -13,4 +13,22 @@ namespace :budgets do
 
   end
 
-end
\ No newline at end of file
+  namespace :phases do
+    desc "Generates Phases for existing Budgets without them & migrates description_* attributes"
+    task generate_missing: :environment do
+      Budget.where.not(id: Budget::Phase.all.pluck(:budget_id).uniq.compact).each do |budget|
+        Budget::Phase::PHASE_KINDS.each do |phase|
+          Budget::Phase.create(
+            budget: budget,
+            kind: phase,
+            description: budget.send("description_#{phase}"),
+            prev_phase: phases&.last,
+            starts_at: phases&.last&.ends_at || Date.current,
+            ends_at: (phases&.last&.ends_at || Date.current) + 1.month
+          )
+        end
+      end
+    end
+  end
+
+end