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..60a933d1e 100644
--- a/packages/backend/migration/1661376843000-remove-mentioned-remote-users-column.js
+++ b/packages/backend/migration/1661376843000-remove-mentioned-remote-users-column.js
@@ -7,6 +7,14 @@ 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")
+			)`);
 	}
 }