diff --git a/packages/backend/migration/1696405744672-clean-up.js b/packages/backend/migration/1696405744672-clean-up.js
new file mode 100644
index 000000000..5ec89b08f
--- /dev/null
+++ b/packages/backend/migration/1696405744672-clean-up.js
@@ -0,0 +1,18 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export class CleanUp1696405744672 {
+    name = 'CleanUp1696405744672'
+
+    async up(queryRunner) {
+        await queryRunner.query(`DROP INDEX "public"."IDX_e7c0567f5261063592f022e9b5"`);
+        await queryRunner.query(`DROP INDEX "public"."IDX_25dfc71b0369b003a4cd434d0b"`);
+    }
+
+    async down(queryRunner) {
+        await queryRunner.query(`CREATE INDEX "IDX_25dfc71b0369b003a4cd434d0b" ON "note" ("attachedFileTypes") `);
+        await queryRunner.query(`CREATE INDEX "IDX_e7c0567f5261063592f022e9b5" ON "note" ("createdAt") `);
+    }
+}
diff --git a/packages/backend/src/models/Note.ts b/packages/backend/src/models/Note.ts
index ed86d4549..0d2422c4f 100644
--- a/packages/backend/src/models/Note.ts
+++ b/packages/backend/src/models/Note.ts
@@ -18,7 +18,6 @@ export class MiNote {
 	@PrimaryColumn(id())
 	public id: string;
 
-	@Index()
 	@Column('timestamp with time zone', {
 		comment: 'The created date of the Note.',
 	})
@@ -151,7 +150,6 @@ export class MiNote {
 	})
 	public fileIds: MiDriveFile['id'][];
 
-	@Index()
 	@Column('varchar', {
 		length: 256, array: true, default: '{}',
 	})