diff --git a/nowait-app-admin-api/src/main/java/com/nowait/applicationadmin/exception/GlobalExceptionHandler.java b/nowait-app-admin-api/src/main/java/com/nowait/applicationadmin/exception/GlobalExceptionHandler.java
index 730d9ab..ad81fbf 100644
--- a/nowait-app-admin-api/src/main/java/com/nowait/applicationadmin/exception/GlobalExceptionHandler.java
+++ b/nowait-app-admin-api/src/main/java/com/nowait/applicationadmin/exception/GlobalExceptionHandler.java
@@ -72,6 +72,7 @@
 import com.nowait.domaincorerdb.token.exception.BusinessException;
 import com.nowait.domaincorerdb.user.exception.UserNotFoundException;
 import com.nowait.domaincoreredis.rank.exception.MenuCounterUpdateException;
+import com.nowait.domaincoreredis.reservation.exception.ReservationDataInconsistencyException;
 
 import io.swagger.v3.oas.annotations.Hidden;
 import lombok.RequiredArgsConstructor;
@@ -562,6 +563,14 @@ public ErrorResponse menuCounterUpdateException(MenuCounterUpdateException e, We
 		return new ErrorResponse(e.getMessage(), MENU_COUNTER_UPDATE.getCode());
 	}
 
+	@ResponseStatus(NOT_FOUND)
+	@ExceptionHandler(ReservationDataInconsistencyException.class)
+	public ErrorResponse reservationDataInconsistencyException(ReservationDataInconsistencyException e, WebRequest request) {
+		alarm(e, request);
+		log.error("reservationDataInconsistencyException", e);
+		return new ErrorResponse(e.getMessage(), RESERVATION_DATA_INCONSISTENCY.getCode());
+	}
+
 	/**
 	 * *  그 외 예외처리
 	 */
diff --git a/nowait-domain/domain-redis/src/main/java/com/nowait/domaincoreredis/reservation/repository/WaitingRedisRepository.java b/nowait-domain/domain-redis/src/main/java/com/nowait/domaincoreredis/reservation/repository/WaitingRedisRepository.java
index f9eb921..1af5b52 100644
--- a/nowait-domain/domain-redis/src/main/java/com/nowait/domaincoreredis/reservation/repository/WaitingRedisRepository.java
+++ b/nowait-domain/domain-redis/src/main/java/com/nowait/domaincoreredis/reservation/repository/WaitingRedisRepository.java
@@ -82,9 +82,7 @@ public void deleteWaiting(Long storeId, String userId) {
 		redisTemplate.opsForHash().delete(numberMapKey, userId);
 
 		// reservationNumber → userId 삭제
-		if (reservationNumber != null) {
-			redisTemplate.opsForHash().delete(userMapKey, reservationNumber);
-		}
+		redisTemplate.opsForHash().delete(userMapKey, reservationNumber);
 
 		String statusKey = RedisKeyUtils.buildWaitingStatusKeyPrefix() + storeId;
 		redisTemplate.opsForHash().delete(statusKey, userId);