diff --git a/packages/backend/migration/1705475608437-reversi.js b/packages/backend/migration/1705475608437-reversi.js
index 45d8c614be..4d7416d1b3 100644
--- a/packages/backend/migration/1705475608437-reversi.js
+++ b/packages/backend/migration/1705475608437-reversi.js
@@ -7,16 +7,10 @@ export class Reversi1705475608437 {
     name = 'Reversi1705475608437'
 
     async up(queryRunner) {
-        // await queryRunner.query(`DROP INDEX "public"."IDX_b46ec40746efceac604142be1c"`);
-        // await queryRunner.query(`DROP INDEX "public"."IDX_b604d92d6c7aec38627f6eaf16"`);
-        // await queryRunner.query(`ALTER TABLE "reversi_game" DROP COLUMN "createdAt"`);
-        // await queryRunner.query(`ALTER TABLE "reversi_matching" DROP COLUMN "createdAt"`);
+        await queryRunner.query(`ALTER TABLE "reversi_game" ALTER COLUMN "createdAt" SET DEFAULT now()`);
     }
 
     async down(queryRunner) {
-        // await queryRunner.query(`ALTER TABLE "reversi_matching" ADD "createdAt" TIMESTAMP WITH TIME ZONE NOT NULL`);
-        // await queryRunner.query(`ALTER TABLE "reversi_game" ADD "createdAt" TIMESTAMP WITH TIME ZONE NOT NULL`);
-        // await queryRunner.query(`CREATE INDEX "IDX_b604d92d6c7aec38627f6eaf16" ON "reversi_matching" ("createdAt") `);
-        // await queryRunner.query(`CREATE INDEX "IDX_b46ec40746efceac604142be1c" ON "reversi_game" ("createdAt") `);
+        await queryRunner.query(`ALTER TABLE "reversi_game" ALTER COLUMN "createdAt" DROP DEFAULT`);
     }
 }
diff --git a/packages/backend/migration/1706011243939-UserProfileBirthdayIndex.js b/packages/backend/migration/1706011243939-UserProfileBirthdayIndex.js
new file mode 100644
index 0000000000..d90d5832b0
--- /dev/null
+++ b/packages/backend/migration/1706011243939-UserProfileBirthdayIndex.js
@@ -0,0 +1,16 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export class UserProfileBirthdayIndex1706011243939 {
+    name = 'UserProfileBirthdayIndex1706011243939'
+
+    async up(queryRunner) {
+        await queryRunner.query(`CREATE INDEX "IDX_58699f75b9cf904f5f007909cb" ON "user_profile" ("birthday") `);
+    }
+
+    async down(queryRunner) {
+        await queryRunner.query(`DROP INDEX "public"."IDX_58699f75b9cf904f5f007909cb"`);
+    }
+}