diff --git a/app/models/grid_weapon.rb b/app/models/grid_weapon.rb
index 9bf51a4..faf50cb 100644
--- a/app/models/grid_weapon.rb
+++ b/app/models/grid_weapon.rb
@@ -1,9 +1,9 @@
 class GridWeapon < ApplicationRecord
     belongs_to :party
 
-    belongs_to :weapon_key1, class_name: 'WeaponKey', foreign_key: :weapon_key1_id
-    belongs_to :weapon_key2, class_name: 'WeaponKey', foreign_key: :weapon_key2_id
-    belongs_to :weapon_key3, class_name: 'WeaponKey', foreign_key: :weapon_key3_id
+    belongs_to :weapon_key1, class_name: 'WeaponKey', foreign_key: :weapon_key1_id, optional: true
+    belongs_to :weapon_key2, class_name: 'WeaponKey', foreign_key: :weapon_key2_id, optional: true
+    belongs_to :weapon_key3, class_name: 'WeaponKey', foreign_key: :weapon_key3_id, optional: true
 
     def weapon
         Weapon.find(self.weapon_id)