diff --git a/src/layouts/payment-method/promo-modal-question/promo-modal-question.vue b/src/layouts/payment-method/promo-modal-question/promo-modal-question.vue
index bf0359b37..8cc561b03 100644
--- a/src/layouts/payment-method/promo-modal-question/promo-modal-question.vue
+++ b/src/layouts/payment-method/promo-modal-question/promo-modal-question.vue
@@ -209,21 +209,17 @@ export default {
             switch (error) {
                 case promoErrorCodes.PROMO_STACKING_NOT_ALLOWED:
                 case promoErrorCodes.SIMILAR_PROMO_ALREADY_ON_ORDER:
-                    if (
-                        additionalInfo.length === 1 &&
+                    return additionalInfo.length === 1 &&
                         additionalInfo[0] === this.promoCode.toUpperCase()
-                    ) {
-                        return (this.displaySimilarPromoAlert = true);
-                    } else {
-                        this.errorMessage = this.StackPromoText?.replaceAll(
-                            "{custom:NEWPROMOCODE}",
-                            this.promoCode.toUpperCase()
-                        ).replaceAll(
-                            "{custom:OLDPROMOCODE}",
-                            this.getConflictingPromoCode(additionalInfo)
-                        );
-                        return (this.displayStackingPromoAlert = true);
-                    }
+                        ? (this.displaySimilarPromoAlert = true)
+                        : ((this.errorMessage = this.StackPromoText?.replace(
+                              /\{custom:(NEW|OLD)PROMOCODE\}/g,
+                              (match, group) =>
+                                  group === "NEW"
+                                      ? this.promoCode.toUpperCase()
+                                      : this.getConflictingPromoCode(additionalInfo)
+                          )),
+                          (this.displayStackingPromoAlert = true));
                 case promoErrorCodes.INVALID_PROMO_ON_ORDER:
                     if (additionalInfo.some((x) => x.toUpperCase() === "APPOINTMENT_TYPE")) {
                         this.errorMessage = this.InShopPromoText?.replaceAll(