diff --git a/src/main/java/com/back/domain/dashboard/admin/service/AdminDashboardServiceImpl.java b/src/main/java/com/back/domain/dashboard/admin/service/AdminDashboardServiceImpl.java
index c864aa35..146b2f56 100644
--- a/src/main/java/com/back/domain/dashboard/admin/service/AdminDashboardServiceImpl.java
+++ b/src/main/java/com/back/domain/dashboard/admin/service/AdminDashboardServiceImpl.java
@@ -121,6 +121,7 @@ public AdminOverviewResponse getOverview(AdminOverviewRequest request) {
                 .getContent();
 
         List<AdminOverviewResponse.ArtistApproval> artistApprovals = pendingApplications.stream()
+                .filter(app -> app.getUser() != null) // User가 null인 경우 필터링
                 .map(app -> new AdminOverviewResponse.ArtistApproval(
                         app.getUser().getId(),
                         app.getArtistName(),
@@ -137,6 +138,7 @@ public AdminOverviewResponse getOverview(AdminOverviewRequest request) {
                 .getContent();
 
         List<AdminOverviewResponse.FundingApproval> fundingApprovals = pendingFundings.stream()
+                .filter(funding -> funding.getUser() != null) // User가 null인 경우 필터링
                 .map(funding -> new AdminOverviewResponse.FundingApproval(
                         funding.getId(),
                         funding.getTitle(),
@@ -649,6 +651,13 @@ public AdminFundingResponse getFundings(AdminFundingSearchRequest request) {
      * Funding Entity → DTO 변환 (화면 표시 필드만, 평면 구조)
      */
     private AdminFundingResponse.Funding convertToFundingDto(Funding funding) {
+        // User null 체크 (FK 제약조건상 발생하면 안되지만 방어적 처리)
+        if (funding.getUser() == null) {
+            log.error("Funding의 User가 null입니다 - fundingId: {}", funding.getId());
+            throw new ServiceException("DATA_INTEGRITY_ERROR", 
+                "펀딩 데이터 무결성 오류 - fundingId: " + funding.getId());
+        }
+        
         // 달성률 계산
         int achievementRate = funding.getTargetAmount() > 0
                 ? (int) ((funding.getCollectedAmount() * 100) / funding.getTargetAmount())
@@ -791,6 +800,13 @@ public AdminArtistApplicationResponse getArtistApplications(AdminArtistApplicati
      * ArtistApplication Entity → DTO 변환
      */
     private AdminArtistApplicationResponse.Application convertToApplicationDto(ArtistApplication application) {
+        // User null 체크 (FK 제약조건상 발생하면 안되지만 방어적 처리)
+        if (application.getUser() == null) {
+            log.error("ArtistApplication의 User가 null입니다 - applicationId: {}", application.getId());
+            throw new ServiceException("DATA_INTEGRITY_ERROR", 
+                "입점 신청 데이터 무결성 오류 - applicationId: " + application.getId());
+        }
+        
         DateTimeFormatter dateFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
 
         return new AdminArtistApplicationResponse.Application(
diff --git a/src/main/java/com/back/domain/dashboard/customer/service/DashboardServiceImpl.java b/src/main/java/com/back/domain/dashboard/customer/service/DashboardServiceImpl.java
index 909d6f3e..935bf24a 100644
--- a/src/main/java/com/back/domain/dashboard/customer/service/DashboardServiceImpl.java
+++ b/src/main/java/com/back/domain/dashboard/customer/service/DashboardServiceImpl.java
@@ -373,6 +373,18 @@ private OrderResponse.Summary convertToOrderSummary(com.back.domain.order.order.
      */
     private OrderResponse.Product convertToProductDto(com.back.domain.order.orderItem.entity.OrderItem orderItem) {
         com.back.domain.product.product.entity.Product product = orderItem.getProduct();
+        
+        // 상품이 삭제되었거나 null인 경우 처리
+        if (product == null) {
+            log.warn("OrderItem의 Product가 null입니다 - orderItemId: {}", orderItem.getId());
+            return new OrderResponse.Product(
+                    null,
+                    "삭제된 상품",
+                    orderItem.getQuantity(),
+                    orderItem.getPrice().intValue(),
+                    null
+            );
+        }
 
         return new OrderResponse.Product(
                 product.getId(),
@@ -388,6 +400,19 @@ private OrderResponse.Product convertToProductDto(com.back.domain.order.orderIte
      */
     private OrderResponse.OrderItem convertToOrderItemDto(com.back.domain.order.orderItem.entity.OrderItem orderItem) {
         com.back.domain.product.product.entity.Product product = orderItem.getProduct();
+        
+        // 상품이 삭제되었거나 null인 경우 처리
+        if (product == null) {
+            log.warn("OrderItem의 Product가 null입니다 - orderItemId: {}", orderItem.getId());
+            return new OrderResponse.OrderItem(
+                    orderItem.getId(),
+                    null,
+                    "삭제된 상품",
+                    orderItem.getQuantity(),
+                    orderItem.getPrice().intValue(),
+                    null
+            );
+        }
 
         return new OrderResponse.OrderItem(
                 orderItem.getId(),
diff --git a/src/main/java/com/back/domain/product/product/service/ProductService.java b/src/main/java/com/back/domain/product/product/service/ProductService.java
index ba45567c..75a060dc 100644
--- a/src/main/java/com/back/domain/product/product/service/ProductService.java
+++ b/src/main/java/com/back/domain/product/product/service/ProductService.java
@@ -298,11 +298,6 @@ public ShareLinkResponse generateShareLink(UUID productUuid, String platform, Cu
         // 베이스 URL 생성 (프론트엔드 URL)
         String baseUrl = frontendUrl + "/product/" + productUuid;
 
-        // UTM 파라미터 생성
-        // utm_source: 유입 경로 (instagram, youtube 등)
-        // utm_medium: 매체 타입 (social 고정)
-        // utm_campaign: 캠페인 (작가 ID 포함)
-        // utm_content: 추가 정보 (product_share 고정)
         String utmParams = String.format(
                 "?utm_source=%s&utm_medium=social&utm_campaign=artist_%d&utm_content=product_share",
                 normalizedPlatform,
@@ -319,7 +314,7 @@ public ShareLinkResponse generateShareLink(UUID productUuid, String platform, Cu
                 normalizedPlatform,
                 artistId,
                 productUuid,
-                product.getName() // 상품명을 설명으로 사용
+                product.getName()
         );
     }