Update nocharge saving logic for older logs to skip validation

lib/tasks/recalculate_nocharges.rake

@@ -39,7 +39,7 @@ namespace :bulk_update do
 
       log.skip_update_status = true
       log.nocharge = log.household_charge
-      if log.save
+      if log.save(validate: false)
         updated_logs_count += 1
         Rails.logger.info "Updated nocharge for log #{log.id}"
       else