diff --git a/db/versions/11191-chocolateBirch/01-firstScript.sql b/db/versions/11191-chocolateBirch/01-firstScript.sql
index 50b27fdbd2..c69e92d51a 100644
--- a/db/versions/11191-chocolateBirch/01-firstScript.sql
+++ b/db/versions/11191-chocolateBirch/01-firstScript.sql
@@ -1,3 +1,3 @@
 ALTER TABLE vn.accountDetailType
-	ADD COLUMN code VARCHAR(45) NOT NULL,
+	ADD COLUMN code VARCHAR(45),
 	ADD UNIQUE (code);
\ No newline at end of file