diff --git a/packages/backend/migration/1661376843000-remove-mentioned-remote-users-column.js b/packages/backend/migration/1661376843000-remove-mentioned-remote-users-column.js
index 42d79b5b5..057d3f9e3 100644
--- a/packages/backend/migration/1661376843000-remove-mentioned-remote-users-column.js
+++ b/packages/backend/migration/1661376843000-remove-mentioned-remote-users-column.js
@@ -6,7 +6,22 @@ export class removeMentionedRemoteUsersColumn1661376843000 {
 	}
 
 	async down(queryRunner) {
-		await queryRunner.query(`ALTER TABLE "note" ADD "mentionedRemoteUsers" TEXT NOT NULL DEFAULT '[]'::text`);
-		await queryRunner.query(`UPDATE "note" SET "mentionedRemoteUsers" = (SELECT COALESCE(json_agg(row_to_json("data"))::text, '[]') FROM (SELECT "url", "uri", "username", "host" FROM "user" JOIN "user_profile" ON "user"."id" = "user_profile". "userId" WHERE "user"."host" IS NOT NULL AND "user"."id" = ANY("note"."mentions")) AS "data")`);
+		await queryRunner.query(`
+			CREATE TEMP TABLE IF NOT EXISTS "temp_mentions" AS
+				SELECT "id", "url", "uri", "username", "host"
+				FROM "user"
+				JOIN "user_profile" ON "user"."id" = "user_profile"."userId" WHERE "user"."host" IS NOT NULL
+		`);
+
+		await queryRunner.query(`
+			CREATE UNIQUE INDEX "temp_mentions_id" ON "temp_mentions"("id")
+		`);
+
+		await queryRunner.query(`
+			UPDATE "note" SET "mentionedRemoteUsers" = (
+				SELECT COALESCE(json_agg(row_to_json("data")::jsonb - "id")::text, '[]') FROM "temp_mentions" AS "data"
+				WHERE "data"."id" = ANY("note"."mentions")
+			)
+		`);
 	}
 }
diff --git a/packages/backend/migration/1663399074403-resize-comments-drive-file.js b/packages/backend/migration/1663399074403-resize-comments-drive-file.js
index a037f1655..0873aec9b 100644
--- a/packages/backend/migration/1663399074403-resize-comments-drive-file.js
+++ b/packages/backend/migration/1663399074403-resize-comments-drive-file.js
@@ -9,6 +9,6 @@ export class resizeCommentsDriveFile1663399074403 {
     }
 
     async down(queryRunner) {
-        await queryRunner.query(`ALTER TABLE "drive_file" ALTER COLUMN "comment" TYPE character varying(512)`);
-    }
+		console.log('This migration cannot be reverted, skipping...');
+	}
 }