diff --git a/migrations/20240324-remove-redundancy-and-fix-issues.sql b/migrations/20240324-remove-redundancy-and-fix-issues.sql
index 7f359e09f..d845be603 100644
--- a/migrations/20240324-remove-redundancy-and-fix-issues.sql
+++ b/migrations/20240324-remove-redundancy-and-fix-issues.sql
@@ -1,8 +1,10 @@
 alter table chat_memberships add column notification bool not null default false;
 alter table chat_memberships alter column notification drop default;
 
-alter table chat_memberships add column last_notified int not null default 0;
+alter table chat_memberships add column last_notified int default 0;
 update chat_memberships a set last_notified=(select created_utc from chat_messages b where a.chat_id=b.chat_id order by created_utc desc limit 1);
+update chat_memberships set last_notified=0 where last_notified is null;
+alter table chat_memberships alter column last_notified set not null;
 alter table chat_memberships alter column last_notified drop default;
 
 drop table chat_notifications;