diff --git a/backend/templates/admin_product_images.html b/backend/templates/admin_product_images.html
index e3abe8d..312e3e8 100644
--- a/backend/templates/admin_product_images.html
+++ b/backend/templates/admin_product_images.html
@@ -743,6 +743,13 @@
         let replaceTargetBarcode = null;
         
         function openReplaceModal(barcode, productName) {
+            console.log('openReplaceModal called with:', barcode, productName);
+            
+            if (!barcode || barcode === 'null' || barcode === 'undefined') {
+                showToast('바코드 정보가 없습니다', 'error');
+                return;
+            }
+            
             replaceTargetBarcode = barcode;
             document.getElementById('replaceProductName').textContent = productName || barcode;
             document.getElementById('replaceBarcode').textContent = barcode;
@@ -769,11 +776,18 @@
                 return;
             }
             
+            // 바코드 검증
+            if (!replaceTargetBarcode || replaceTargetBarcode === 'null' || replaceTargetBarcode === 'undefined') {
+                showToast('바코드 정보가 없습니다. 다시 시도해주세요.', 'error');
+                return;
+            }
+            
+            const barcode = replaceTargetBarcode;
             closeReplaceModal();
-            showToast('이미지 다운로드 중...', 'info');
+            showToast(`"${barcode}" 이미지 다운로드 중...`, 'info');
             
             try {
-                const res = await fetch(`/api/admin/product-images/${replaceTargetBarcode}/replace`, {
+                const res = await fetch(`/api/admin/product-images/${barcode}/replace`, {
                     method: 'POST',
                     headers: { 'Content-Type': 'application/json' },
                     body: JSON.stringify({ image_url: imageUrl })