diff --git a/src/main/kotlin/kr/co/vividnext/sodalive/creator/admin/content/series/CreatorAdminContentSeriesService.kt b/src/main/kotlin/kr/co/vividnext/sodalive/creator/admin/content/series/CreatorAdminContentSeriesService.kt
index 28fbdea..b60a799 100644
--- a/src/main/kotlin/kr/co/vividnext/sodalive/creator/admin/content/series/CreatorAdminContentSeriesService.kt
+++ b/src/main/kotlin/kr/co/vividnext/sodalive/creator/admin/content/series/CreatorAdminContentSeriesService.kt
@@ -140,8 +140,8 @@ class CreatorAdminContentSeriesService(
                 throw SodaException("랜덤과 연재요일 동시에 선택할 수 없습니다.")
             }
 
-            series.publishedDaysOfWeek.toMutableSet().clear()
-            series.publishedDaysOfWeek.toMutableSet().addAll(request.publishedDaysOfWeek)
+            series.publishedDaysOfWeek.clear()
+            series.publishedDaysOfWeek.addAll(request.publishedDaysOfWeek)
         }
 
         if (request.genreId != null) {
diff --git a/src/main/kotlin/kr/co/vividnext/sodalive/creator/admin/content/series/Series.kt b/src/main/kotlin/kr/co/vividnext/sodalive/creator/admin/content/series/Series.kt
index 496c4fc..c8262a0 100644
--- a/src/main/kotlin/kr/co/vividnext/sodalive/creator/admin/content/series/Series.kt
+++ b/src/main/kotlin/kr/co/vividnext/sodalive/creator/admin/content/series/Series.kt
@@ -4,7 +4,6 @@ import kr.co.vividnext.sodalive.admin.content.series.genre.SeriesGenre
 import kr.co.vividnext.sodalive.common.BaseEntity
 import kr.co.vividnext.sodalive.creator.admin.content.series.keyword.SeriesKeyword
 import kr.co.vividnext.sodalive.member.Member
-import org.hibernate.annotations.Cascade
 import javax.persistence.CascadeType
 import javax.persistence.CollectionTable
 import javax.persistence.Column
@@ -38,8 +37,7 @@ data class Series(
     @ElementCollection(targetClass = SeriesPublishedDaysOfWeek::class, fetch = FetchType.EAGER)
     @Enumerated(value = EnumType.STRING)
     @CollectionTable(name = "series_published_days_of_week", joinColumns = [JoinColumn(name = "series_id")])
-    @Cascade(value = [org.hibernate.annotations.CascadeType.ALL])
-    val publishedDaysOfWeek: Set<SeriesPublishedDaysOfWeek> = mutableSetOf(),
+    val publishedDaysOfWeek: MutableSet<SeriesPublishedDaysOfWeek> = mutableSetOf(),
     var isAdult: Boolean = false,
     var isActive: Boolean = true
 ) : BaseEntity() {