diff --git a/src/main/java/in/koreatech/koin/domain/community/article/model/ArticleSearchKeyword.java b/src/main/java/in/koreatech/koin/domain/community/article/model/ArticleSearchKeyword.java
index 373702666..17d7cd394 100644
--- a/src/main/java/in/koreatech/koin/domain/community/article/model/ArticleSearchKeyword.java
+++ b/src/main/java/in/koreatech/koin/domain/community/article/model/ArticleSearchKeyword.java
@@ -57,7 +57,6 @@ public void updateWeight(double newWeight) {
 
     public void resetWeight() {
         this.weight = 1.0;
-        this.lastSearchedAt = LocalDateTime.now();
     }
 
     public void incrementTotalSearch() {
diff --git a/src/main/java/in/koreatech/koin/domain/community/article/model/ArticleSearchKeywordIpMap.java b/src/main/java/in/koreatech/koin/domain/community/article/model/ArticleSearchKeywordIpMap.java
index b901ee098..77e214d53 100644
--- a/src/main/java/in/koreatech/koin/domain/community/article/model/ArticleSearchKeywordIpMap.java
+++ b/src/main/java/in/koreatech/koin/domain/community/article/model/ArticleSearchKeywordIpMap.java
@@ -12,6 +12,7 @@
 import jakarta.persistence.JoinColumn;
 import jakarta.persistence.ManyToOne;
 import jakarta.persistence.Table;
+import jakarta.persistence.UniqueConstraint;
 import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
@@ -19,7 +20,8 @@
 @Getter
 @Entity
 @Table(name = "article_search_keyword_ip_map", indexes = {
-    @Index(name = "idx_ip_address", columnList = "ipAddress")
+    @Index(name = "idx_ip_address", columnList = "ipAddress")}, uniqueConstraints = {
+    @UniqueConstraint(name = "ux_keyword_ip", columnNames = {"keyword_id", "ipAddress"})
 })
 @NoArgsConstructor(access = PROTECTED)
 public class ArticleSearchKeywordIpMap extends BaseEntity {
diff --git a/src/main/java/in/koreatech/koin/domain/community/article/repository/ArticleSearchKeywordIpMapRepository.java b/src/main/java/in/koreatech/koin/domain/community/article/repository/ArticleSearchKeywordIpMapRepository.java
index 173023dce..0d3ab84f5 100644
--- a/src/main/java/in/koreatech/koin/domain/community/article/repository/ArticleSearchKeywordIpMapRepository.java
+++ b/src/main/java/in/koreatech/koin/domain/community/article/repository/ArticleSearchKeywordIpMapRepository.java
@@ -15,5 +15,5 @@ public interface ArticleSearchKeywordIpMapRepository extends Repository<ArticleS
 
     Optional<ArticleSearchKeywordIpMap> findByArticleSearchKeywordAndIpAddress(ArticleSearchKeyword keyword, String ipAddress);
 
-    List<ArticleSearchKeywordIpMap> findByCreatedAtBetween(LocalDateTime fiveHoursThirtyMinutesAgo, LocalDateTime now);
+    List<ArticleSearchKeywordIpMap> findByUpdatedAtBetween(LocalDateTime before, LocalDateTime now);
 }
diff --git a/src/main/java/in/koreatech/koin/domain/community/article/repository/ArticleSearchKeywordRepository.java b/src/main/java/in/koreatech/koin/domain/community/article/repository/ArticleSearchKeywordRepository.java
index 227623c90..a526d1b2e 100644
--- a/src/main/java/in/koreatech/koin/domain/community/article/repository/ArticleSearchKeywordRepository.java
+++ b/src/main/java/in/koreatech/koin/domain/community/article/repository/ArticleSearchKeywordRepository.java
@@ -31,5 +31,5 @@ public interface ArticleSearchKeywordRepository extends Repository<ArticleSearch
         """)
     List<String> findTopKeywordsByLatest(Pageable pageable);
 
-    List<ArticleSearchKeyword> findByCreatedAtBetween(LocalDateTime startTime, LocalDateTime endTime);
+    List<ArticleSearchKeyword> findByUpdatedAtBetween(LocalDateTime startTime, LocalDateTime endTime);
 }
diff --git a/src/main/java/in/koreatech/koin/domain/community/article/service/ArticleService.java b/src/main/java/in/koreatech/koin/domain/community/article/service/ArticleService.java
index 64ccc18c9..1996d03c6 100644
--- a/src/main/java/in/koreatech/koin/domain/community/article/service/ArticleService.java
+++ b/src/main/java/in/koreatech/koin/domain/community/article/service/ArticleService.java
@@ -211,8 +211,6 @@ private void updateKeywordWeightAndCount(ArticleSearchKeyword keyword, ArticleSe
         if (map.getSearchCount() <= 10) {
             keyword.updateWeight(keyword.getWeight() + additionalWeight);
         }
-
-        keyword.updateWeight(keyword.getWeight() + additionalWeight);
         articleSearchKeywordRepository.save(keyword);
     }
 
@@ -221,9 +219,9 @@ public void resetWeightsAndCounts() {
         LocalDateTime now = LocalDateTime.now();
         LocalDateTime before = now.minusHours(6).minusMinutes(30);
 
-        List<ArticleSearchKeyword> keywordsToUpdate = articleSearchKeywordRepository.findByCreatedAtBetween(
+        List<ArticleSearchKeyword> keywordsToUpdate = articleSearchKeywordRepository.findByUpdatedAtBetween(
             before, now);
-        List<ArticleSearchKeywordIpMap> ipMapsToUpdate = articleSearchKeywordIpMapRepository.findByCreatedAtBetween(
+        List<ArticleSearchKeywordIpMap> ipMapsToUpdate = articleSearchKeywordIpMapRepository.findByUpdatedAtBetween(
             before, now);
 
         for (ArticleSearchKeyword keyword : keywordsToUpdate) {
diff --git a/src/main/resources/db/migration/V60__alter_search_keywords_and_ip_map_unique_cascade.sql b/src/main/resources/db/migration/V60__alter_search_keywords_and_ip_map_unique_cascade.sql
new file mode 100644
index 000000000..b2965a323
--- /dev/null
+++ b/src/main/resources/db/migration/V60__alter_search_keywords_and_ip_map_unique_cascade.sql
@@ -0,0 +1,9 @@
+ALTER TABLE `article_search_keywords`
+    MODIFY COLUMN `keyword` VARCHAR(255) NOT NULL UNIQUE;
+
+ALTER TABLE article_search_keyword_ip_map
+    ADD CONSTRAINT unique_keyword_ip UNIQUE (keyword_id, ip_address),
+    ADD CONSTRAINT fk_keyword_id
+    FOREIGN KEY (keyword_id)
+    REFERENCES article_search_keywords (id)
+    ON DELETE CASCADE;