diff --git a/src/main/java/com/issueDive/entity/Comment.java b/src/main/java/com/issueDive/entity/Comment.java
index c91e0c9..276f8c5 100644
--- a/src/main/java/com/issueDive/entity/Comment.java
+++ b/src/main/java/com/issueDive/entity/Comment.java
@@ -40,15 +40,14 @@ public class Comment {
         @OneToMany(mappedBy = "parent", cascade = CascadeType.ALL, orphanRemoval = true)
         private List<Comment> children = new ArrayList<>();
 
-        @Column(name = "created_at", updatable = false, insertable = false)
+        @Column(name = "created_at", nullable = false, updatable = false)
         private LocalDateTime createdAt;
 
-        @Column(name = "updated_at", insertable = false)
+        @Column(name = "updated_at", nullable = false)
         private LocalDateTime updatedAt;
 
         public void changeDescription(String description) { this.description = description; }
 
-
         @PrePersist
         public void prePersist() {
                 LocalDateTime now = LocalDateTime.now();
diff --git a/src/main/java/com/issueDive/entity/Label.java b/src/main/java/com/issueDive/entity/Label.java
index 4476f1e..11e9b0a 100644
--- a/src/main/java/com/issueDive/entity/Label.java
+++ b/src/main/java/com/issueDive/entity/Label.java
@@ -30,10 +30,10 @@ public class Label {
     @Column(length = 200)
     private String description;
 
-    @Column(name = "created_at", updatable = false)
+    @Column(name = "created_at", nullable = false, updatable = false)
     private LocalDateTime createdAt;
 
-    @Column(name = "updated_at")
+    @Column(name = "updated_at", nullable = false)
     private LocalDateTime updatedAt;
 
     @PrePersist