diff --git a/src/controllers/api/upgradesController.ts b/src/controllers/api/upgradesController.ts
index 855d2aa7..8a0648b1 100644
--- a/src/controllers/api/upgradesController.ts
+++ b/src/controllers/api/upgradesController.ts
@@ -25,13 +25,16 @@ export const upgradesController: RequestHandler = async (req, res) => {
             operation.UpgradeRequirement == "/Lotus/Types/Items/MiscItems/CustomizationSlotUnlocker"
         ) {
             updateCurrency(inventory, 10, true);
-        } else if (operation.OperationType != "UOT_ABILITY_OVERRIDE") {
+        } else if (operation.UpgradeRequirement) {
             addMiscItems(inventory, [
                 {
                     ItemType: operation.UpgradeRequirement,
                     ItemCount: -1
                 } satisfies IMiscItem
             ]);
+        } else {
+            // UOT_SWAP_POLARITY - free operation
+            // UOT_ABILITY_OVERRIDE - handled below
         }
 
         if (operation.OperationType == "UOT_ABILITY_OVERRIDE") {