MySQL 5.7 to 8.0 migration

I'm trying to upgrade my MySQL 5.7 database to 8.0, but I get the following error:

We're sorry, your request to modify DB instance XXXXXXXXXX has failed. Current Option Group (default:mysql-5-7-db-XXXXXXXXXXXXXXXXXXXX-upgrade) is non-default. You need to explicitly specify a new Option Group in this case (default or custom)

However, I don't see this setting in the options. Where should I look?