diff --git a/core/src/main/resources/db/migration/V7__project_parent_phase2_review.sql b/core/src/main/resources/db/migration/V7__project_parent_phase2_review.sql
index dd5e3e588c..394207522f 100644
--- a/core/src/main/resources/db/migration/V7__project_parent_phase2_review.sql
+++ b/core/src/main/resources/db/migration/V7__project_parent_phase2_review.sql
@@ -6,7 +6,7 @@ alter table `project`
     add column `root_project_id` bigint(20) null default null;
 
 alter table `project`
-    add column `clone_timestamp` datetime not null default null;
+    add column `clone_timestamp` datetime null default null;
 
 alter table `project`
     add constraint fk_project_parent_project_id_project_id
@@ -20,9 +20,7 @@ alter table `project`
 
 
 alter table `reviewer_approval`
-    add column `is_cloned` bit(1) not null default false;
+    add column `is_cloned` bit(1) null default null;
 
 alter table `reviewer_approval`
-    add column `clone_timestamp` datetime not null default null;
-
-update table `reviewer_approval` set is_cloned = false;
\ No newline at end of file
+    add column `clone_timestamp` datetime null default null;