diff --git a/app/models/budget/investment.rb b/app/models/budget/investment.rb
index 9a6fcedde..28f52023d 100644
--- a/app/models/budget/investment.rb
+++ b/app/models/budget/investment.rb
@@ -413,7 +413,7 @@ class Budget
             log.investment_id = self.id
             log.new_value = self.send field
             log.old_value = self.send "#{field}_was"
-            !log.save
+            log.save!
           end
         end
       end
diff --git a/app/models/budget/investment/change_log.rb b/app/models/budget/investment/change_log.rb
index fe5839b14..5b5123ae0 100644
--- a/app/models/budget/investment/change_log.rb
+++ b/app/models/budget/investment/change_log.rb
@@ -5,8 +5,6 @@ class Budget::Investment::ChangeLog < ApplicationRecord
     inverse_of:  :budget_investment_change_logs,
     required:    false
 
-  validates :old_value, presence: true
-  validates :new_value, presence: true
   validates :field, presence: true
 
   scope :by_investment, ->(investment_id) { where(investment_id: investment_id) }