fix(gift): 카테고리 접수 코드 중복을 허용한다

docs/20260929_크리에이터_선물하기/gift-schema.sql

@@ -126,3 +126,5 @@ CREATE TABLE gift_application_no_sequence (
     UNIQUE KEY uk_gift_application_no_sequence_category_date (category_id, sequence_date),
     CONSTRAINT fk_gift_application_no_sequence_category FOREIGN KEY (category_id) REFERENCES gift_category (id)
 ) COMMENT='선물 신청번호 날짜별 채번';
+
+ALTER TABLE gift_category DROP INDEX uk_gift_category_receipt_code;

src/main/kotlin/kr/co/vividnext/sodalive/v2/gift/adapter/out/persistence/GiftCategory.kt

@@ -11,8 +11,7 @@ import javax.persistence.UniqueConstraint
     name = "gift_category",
     uniqueConstraints = [
         UniqueConstraint(name = "uk_gift_category_classification_number", columnNames = ["classification_number"]),
-        UniqueConstraint(name = "uk_gift_category_code", columnNames = ["category_code"]),
-        UniqueConstraint(name = "uk_gift_category_receipt_code", columnNames = ["receipt_code"])
+        UniqueConstraint(name = "uk_gift_category_code", columnNames = ["category_code"])
     ]
 )
 class GiftCategory(

src/test/kotlin/kr/co/vividnext/sodalive/v2/gift/adapter/out/persistence/GiftEntityMappingTest.kt

@@ -92,7 +92,7 @@ class GiftEntityMappingTest @Autowired constructor(
     }
 
     @Test
-    @DisplayName("신청번호와 카테고리 unique 값과 리뷰 선물 ID는 중복 저장할 수 없다")
+    @DisplayName("신청번호와 카테고리 분류번호 및 코드와 리뷰 선물 ID는 중복 저장할 수 없다")
     fun shouldRejectDuplicateUniqueValues() {
         val category = giftCategoryRepository.save(giftCategory("100", "DOLL", "A"))
         val gift = giftRepository.save(gift(category.id!!, "G20260929000001"))
@@ -108,14 +108,21 @@ class GiftEntityMappingTest @Autowired constructor(
         assertThrows(DataIntegrityViolationException::class.java) {
             giftCategoryRepository.saveAndFlush(giftCategory("100", "TOY", "B"))
         }
-        assertThrows(DataIntegrityViolationException::class.java) {
-            giftCategoryRepository.saveAndFlush(giftCategory("101", "TOY", "A"))
-        }
         assertThrows(DataIntegrityViolationException::class.java) {
             giftReviewRepository.saveAndFlush(GiftReview(giftId = gift.id!!, senderMemberId = 1L, rating = 4))
         }
     }
 
+    @Test
+    @DisplayName("카테고리 접수 코드는 중복 저장할 수 있다")
+    fun shouldAllowDuplicateReceiptCode() {
+        val first = giftCategoryRepository.saveAndFlush(giftCategory("100", "DOLL", "A"))
+        val second = giftCategoryRepository.saveAndFlush(giftCategory("101", "TOY", "A"))
+
+        assertNotNull(first.id)
+        assertNotNull(second.id)
+    }
+
     @Test
     @DisplayName("카테고리와 날짜별 신청번호 채번 sequence를 저장한다")
     fun shouldSaveApplicationNoSequence() {