diff --git a/src/migrations/20221125185244-change-request-unique-approvals.js b/src/migrations/20221125185244-change-request-unique-approvals.js
new file mode 100644
index 0000000000..e5468422d2
--- /dev/null
+++ b/src/migrations/20221125185244-change-request-unique-approvals.js
@@ -0,0 +1,17 @@
+exports.up = function (db, cb) {
+    db.runSql(
+        `
+      ALTER TABLE change_request_approvals ADD CONSTRAINT unique_approvals UNIQUE (change_request_id, created_by);
+    `,
+        cb,
+    );
+};
+
+exports.down = function (db, cb) {
+    db.runSql(
+        `
+      ALTER TABLE change_request_approvals DROP CONSTRAINT unique_approvals;
+`,
+        cb,
+    );
+};