diff --git a/db/data/20230102160350_migrate_limit_to_boolean.rb b/db/data/20230102160350_migrate_limit_to_boolean.rb
index 41b359f..927d6c2 100644
--- a/db/data/20230102160350_migrate_limit_to_boolean.rb
+++ b/db/data/20230102160350_migrate_limit_to_boolean.rb
@@ -3,15 +3,22 @@
 class MigrateLimitToBoolean < ActiveRecord::Migration[6.1]
   def up
     Weapon.all.each do |weapon|
-      weapon.limit2 = weapon.limit > 0
+      if weapon.limit && weapon.limit > 0
+        weapon.limit2 = true
+      else
+        weapon.limit2 = false
+      end
     end
 
     Summon.all.each do |summon|
-      summon.limit2 = summon.limit > 0
+      if summon.limit && summon.limit > 0
+        summon.limit2 = true
+      else
+        summon.limit2 = false
+      end
+    end
+
+    def down
+      raise ActiveRecord::IrreversibleMigration
     end
   end
-
-  def down
-    raise ActiveRecord::IrreversibleMigration
-  end
-end