bug: 비로그인 유저 매장별 환급쿠폰 조회시 중복행 제거

Author: 82everywin

src/main/java/com/appcenter/marketplace/domain/payback/repository/PaybackRepositoryCustomImpl.java

@@ -45,7 +45,7 @@ public List<PaybackRes> findCouponsForAdminByMarketId(Long marketId, Long coupon
     public List<PaybackRes> findCouponsForMembersByMarketId(Long marketId, Long memberId, Long couponId, Integer size) {
         QMemberPayback paybackCoupon = new QMemberPayback("paybackCoupon");
 
-        return queryFactory.select(new QPaybackRes(
+        return queryFactory.selectDistinct(new QPaybackRes(
                         payback.id,
                         payback.name,
                         payback.description,