diff --git a/apps/web/process/create-kp/reactions.ts b/apps/web/process/create-kp/reactions.ts
index 174a8b1..42e8390 100644
--- a/apps/web/process/create-kp/reactions.ts
+++ b/apps/web/process/create-kp/reactions.ts
@@ -14,4 +14,22 @@ export function common({ store }: ProcessContext) {
       }
     }
   );
+
+  reaction(
+    () => $calculation.element('cbxPriceWithDiscount').getValue(),
+    (priceWithDiscount) => {
+      if (priceWithDiscount === true) {
+        $calculation.element('cbxFullPriceWithDiscount').setValue(false);
+      }
+    }
+  );
+
+  reaction(
+    () => $calculation.element('cbxFullPriceWithDiscount').getValue(),
+    (fullPriceWithDiscount) => {
+      if (fullPriceWithDiscount === true) {
+        $calculation.element('cbxPriceWithDiscount').setValue(false);
+      }
+    }
+  );
 }