diff --git a/src/main/java/com/gdschongik/gdsc/domain/study/domain/AssignmentHistory.java b/src/main/java/com/gdschongik/gdsc/domain/study/domain/AssignmentHistory.java
index ca6c93fd0..a7384e53c 100644
--- a/src/main/java/com/gdschongik/gdsc/domain/study/domain/AssignmentHistory.java
+++ b/src/main/java/com/gdschongik/gdsc/domain/study/domain/AssignmentHistory.java
@@ -17,6 +17,8 @@
 import jakarta.persistence.Id;
 import jakarta.persistence.JoinColumn;
 import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+import jakarta.persistence.UniqueConstraint;
 import java.time.LocalDateTime;
 import lombok.AccessLevel;
 import lombok.Builder;
@@ -26,6 +28,7 @@
 @Getter
 @Entity
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
+@Table(uniqueConstraints = {@UniqueConstraint(columnNames = {"study_detail_id", "member_id"})})
 public class AssignmentHistory extends BaseEntity {
 
     @Id