diff --git a/backend/src/main/java/com/festago/festival/domain/Festival.java b/backend/src/main/java/com/festago/festival/domain/Festival.java
index 64602cc87..4d2a013d2 100644
--- a/backend/src/main/java/com/festago/festival/domain/Festival.java
+++ b/backend/src/main/java/com/festago/festival/domain/Festival.java
@@ -39,6 +39,7 @@ public class Festival extends BaseTimeEntity {
     @Size(max = 255)
     private String thumbnail;
 
+    @NotNull
     @ManyToOne(fetch = FetchType.LAZY)
     private School school;
 
diff --git a/backend/src/main/java/com/festago/ticket/domain/Ticket.java b/backend/src/main/java/com/festago/ticket/domain/Ticket.java
index fe873d0ff..67f1604cf 100644
--- a/backend/src/main/java/com/festago/ticket/domain/Ticket.java
+++ b/backend/src/main/java/com/festago/ticket/domain/Ticket.java
@@ -39,6 +39,7 @@ public class Ticket extends BaseTimeEntity {
     @ManyToOne(fetch = FetchType.LAZY)
     private Stage stage;
 
+    @NotNull
     private Long schoolId;
 
     @NotNull