diff --git a/gateway/sql/migrations/20220717122538_add_created_at_not_null_constraint.down.sql b/gateway/sql/migrations/20220717122538_add_created_at_not_null_constraint.down.sql
new file mode 100644
index 0000000..043e6f7
--- /dev/null
+++ b/gateway/sql/migrations/20220717122538_add_created_at_not_null_constraint.down.sql
@@ -0,0 +1 @@
+ALTER TABLE et_runtime_data ALTER COLUMN created_at DROP NOT NULL;
diff --git a/gateway/sql/migrations/20220717122538_add_created_at_not_null_constraint.up.sql b/gateway/sql/migrations/20220717122538_add_created_at_not_null_constraint.up.sql
new file mode 100644
index 0000000..ea58c2f
--- /dev/null
+++ b/gateway/sql/migrations/20220717122538_add_created_at_not_null_constraint.up.sql
@@ -0,0 +1 @@
+ALTER TABLE et_runtime_data ALTER COLUMN created_at SET NOT NULL;